Best CRM Software In 2025
In today's hyper-competitive business landscape, a robust Customer Relationship Management (CRM) system is the central nervous system of any successful organization. The best platforms have evolved far beyond simple contact databases into intelligent, AI-powered hubs that unify sales, marketing, and customer service. This list ranks the top 25 CRM solutions based on a comprehensive evaluation of their feature depth, user experience, scalability, integration ecosystem, and overall value. From...
Top Ranked
Salesforce Marketing Cloud is a comprehensive marketing suite, with Email Studio being its core email marketing component. It offers advanced journey building, allowing marketers to orchestrate complex, personalized customer experiences across multiple channels. Key features include Einstein AI for...
Why this score
Scores 8.7/10 due to its unparalleled scale, deep personalization capabilities, and powerful Journey Builder. However, it has a high cost of entry and limited free plan availability.
Scoring methodology
Notion is a versatile all-in-one workspace that blends notes, docs, wikis, and project management databases. Its project management strength comes from relational databases that can be viewed as tables, boards, timelines, or calendars, all within a collaborative doc environment. It includes template...
Why this score
Notion scores 9.0/10 due to its versatile functionality and seamless integration capabilities, though it has a learning curve and some limitations in mobile functionality.
Scoring methodology
Monday.com is a versatile Work Operating System that can be powerfully adapted for bug tracking, especially in environments where technical and non-technical teams need to collaborate. Its strength lies in highly visual and customizable boards, columns, and dashboards. Teams can design a bug trackin...
Why this score
Monday.com scores 8.4/10 due to its highly visual and customizable boards, robust bug tracking capabilities, and versatile Work Operating System. However, the steep learning curve for new users and limited free plan options bring down the score.
Scoring methodology
Vidyard is a screen recording platform laser-focused on business communication, particularly for sales, marketing, and customer success teams. It goes beyond simple recording to function as a full video messaging and analytics platform. Users can record personalized videos (screen, webcam, or both)...
Why this score
Vidyard scores 8.6/10 due to its user-friendly interface, advanced analytics, and integration capabilities. However, the limited free plan options and higher pricing for large enterprises are minor drawbacks.
Scoring methodology
Wix is a versatile website builder that has significantly expanded its e-commerce capabilities. Its intuitive drag-and-drop interface makes it incredibly easy to create visually appealing online stores, even for beginners. While not as feature-rich as Shopify or BigCommerce, Wix offers a wide range...
Why this score
Wix scores 9.5/10 due to its extensive template library, highly intuitive drag-and-drop editor, and vast App Market for extended functionality. However, it lacks advanced customization options for experienced users and has higher pricing for enterprise plans.
Scoring methodology
Bitrix24 is a vast, free-tier collaboration platform that includes a fully-featured CRM. Beyond contact and deal management, it incorporates tools for tasks, projects, document management, messaging, video calls, and a company social intranet. Its CRM includes telephony, marketing automation, and he...
Why this score
Bitrix24 scores 7.3/10 due to its comprehensive feature set and free tier, but it suffers from a steep learning curve and limited customization in the free plan.
Scoring methodology
Salesforce is the undisputed market leader and most comprehensive CRM platform, offering a vast ecosystem of cloud-based products. Its core Sales Cloud provides powerful lead, opportunity, and pipeline management, while its Service, Marketing, and Commerce Clouds create a full 360-degree customer vi...
Why this score
Salesforce scores 8.5/10 due to its comprehensive suite of cloud-based products and robust lead management tools, but it is expensive for small businesses and has a steep learning curve.
Scoring methodology
HubSpot CRM is renowned for its exceptional user experience and powerful free core CRM, making it a top choice for growing businesses. It seamlessly integrates marketing, sales, service, and CMS tools into a single, intuitive platform. Its strength is in inbound methodology, with excellent tools for...
Why this score
HubSpot CRM scores 9.0/10 due to its exceptional user experience, powerful free core CRM, and comprehensive inbound methodology tools. However, it has limitations such as higher costs for advanced features and a steep learning curve.
Scoring methodology
DonorPerfect is a long-standing, versatile fundraising CRM that balances ease of use with deep reporting capabilities. It offers a wide range of tools for managing donors, tracking gifts, and executing multi-channel fundraising campaigns. Its strength lies in its reporting engine, which allows users...
Why this score
DonorPerfect scores 8.4/10 due to its comprehensive donor management features and user-friendly interface, but it lacks advanced reporting options and can be expensive for larger nonprofits.
Scoring methodology
Miro is an infinite online whiteboard platform that has become a staple for remote collaboration, brainstorming, and workshop facilitation. While not a dedicated UI wireframing tool like Figma, its strength for wireframing lies in the earliest, most conceptual stages of design. Teams can use its vas...
Why this score
Miro scores 8.2/10 due to its robust collaboration features, versatility in workspace usage, and real-time editing capabilities. However, it lacks specific design tools and has a steep learning curve for advanced users.
Scoring methodology
MarketMuse uses AI to analyze your entire website and identify content gaps, helping you build topical authority and rank for competitive keywords. Unlike simple keyword tools, MarketMuse looks at the depth and quality of your content compared to the entire web. It provides a clear strategy for what...
Why this score
MarketMuse scores 9.0/10 due to its advanced keyword research and SEO analysis capabilities, which significantly enhance content marketing effectiveness. However, the higher cost and learning curve are minor drawbacks.
Scoring methodology
ActiveCampaign is a powerful and versatile email automation platform particularly well-suited for small to medium-sized businesses. It combines email marketing, marketing automation, and CRM functionalities into a single, user-friendly interface. Its visual automation builder allows for creating com...
Why this score
ActiveCampaign scores 8.2/10 due to its robust automation and CRM features, but it can be expensive for large enterprises and has a steep learning curve.
Scoring methodology
CoSchedule is more than just a social media tool; it is a comprehensive marketing calendar that integrates social media scheduling with blog posts, email campaigns, and project management. It is designed for marketing teams that need to coordinate their entire content strategy in one place. By centr...
Why this score
CoSchedule scores 8.3/10 due to its comprehensive feature set, including unified calendar and robust integrations, but it is limited by a higher cost and less focus on email marketing.
Scoring methodology
Sketch pioneered the modern, focused UI/UX design tool when it launched in 2010, moving away from the bloat of general-purpose suites. It is a Mac-native application beloved for its simplicity, speed, and intuitive vector editing tailored specifically for digital design. Sketch popularized concepts...
Why this score
Sketch scores 8.0/10 due to its intuitive vector editing, Mac-native performance, and extensive symbol library. However, it lacks built-in prototyping tools and has a limited plugin ecosystem compared to Adobe products.
Scoring methodology
BigCommerce is a robust, enterprise-focused e-commerce platform (SaaS) that competes directly with Shopify. It targets medium to large businesses and fast-growing brands. Its core strengths include native B2B functionality, superior built-in features (like multi-currency), and an API-first architect...
Why this score
BigCommerce scores 7.8/10 due to its robust features like native B2B functionality and multi-currency support, but it's more expensive than some competitors and has a steeper learning curve.
Scoring methodology
Squarespace is renowned for its stunning, award-winning designer templates and all-in-one platform that emphasizes aesthetics and cohesive branding. It's ideal for creatives, portfolios, bloggers, and small businesses that value visual appeal. The structured editor provides less free-form drag-and-d...
Why this score
Squarespace scores 7.0/10 due to its strong focus on aesthetics and user-friendly interface, but it falls short with higher costs and limited customization options for advanced users.
Scoring methodology
Webflow is a professional-grade visual web development platform that combines the ease of a designer with the power of HTML, CSS, and JavaScript. It targets designers, freelancers, and agencies who require pixel-perfect control without writing code. Its core strength is a fully customizable CMS and...
Why this score
Webflow scores 7.5/10 due to its powerful design capabilities and ease of use for designers, but it has a steeper learning curve for non-designers and higher costs compared to some alternatives.
Scoring methodology
Creatio (formerly bpm'online) is a powerful no-code platform for CRM and business process automation (BPM). It provides robust studios to model sales, marketing, and service processes with drag-and-drop ease, making it highly customizable without coding. It offers strong industry-specific solutions...
Why this score
Creatio scores 8.1/10 due to its powerful no-code platform and robust industry-specific solutions, but it suffers from a steep learning curve and higher costs compared to some competitors.
Scoring methodology
ConvertKit is built specifically for creatorsbloggers, YouTubers, and podcasters. It focuses on simplicity and high conversion rates through a subscriber-centric approach. Unlike traditional list-based tools, ConvertKit uses a tagging system that makes it incredibly easy to segment your audience bas...
Why this score
ConvertKit scores 7.8/10 due to its user-friendly interface, visual automation sequences, and focus on building relationships. However, it has limitations such as higher costs for large-scale users and less customization options.
Scoring methodology
Salesflare is an intelligent, automated CRM designed specifically for B2B companies. It focuses on minimizing manual input by automatically gathering data from email, calendar, social media, and company databases to build rich contact profiles and interaction histories. It offers visual pipeline man...
Why this score
Salesflare scores 8.6/10 due to its advanced data gathering capabilities and visual pipeline management, which significantly reduce manual input for B2B companies. However, the steep learning curve and limited mobile app functionality are drawbacks.
Scoring methodology
Zapier is a leading integration platform that connects thousands of apps and services, enabling users to automate workflows without coding. It operates on a trigger-action model: a trigger in one app initiates an action in another. Plans start at $30/month, with a free tier offering limited 'Zaps'....
Why this score
Zapier scores 9.8/10 due to its extensive integration capabilities and user-friendly interface, which make it highly versatile for marketing automation. However, the free plan limitations and occasional slow customer support can slightly impact this score.
Scoring methodology
Drift is the pioneer of Conversational Marketing and Sales, a platform built specifically to use live chat as a revenue acceleration engine for B2B companies. It moves beyond support to focus on qualifying leads, booking meetings, and accelerating pipeline through personalized, automated conversatio...
Why this score
Drift scores 7.6/10 due to its advanced features like personalized chat and lead qualification, but it can be expensive for smaller businesses and has a steep learning curve.
Scoring methodology
Tresorit is an enterprise-grade cloud storage and backup solution that prioritizes security above all else. It is designed for businesses that handle highly sensitive data, such as legal, financial, or healthcare firms. It offers end-to-end encryption and is fully compliant with GDPR, HIPAA, and oth...
Why this score
Tresorit scores 8.9/10 due to its strong end-to-end encryption and zero-knowledge architecture, compliance with GDPR, and detailed activity logs. However, the limited free plan options and higher cost for enterprise plans are notable weaknesses.
Scoring methodology
Less Annoying CRM lives up to its name by offering an extremely simple, straightforward, and affordable CRM. It follows a flat-rate pricing model per user with all features included. The interface is clean and focused on contacts, calendar events, tasks, and a simple pipeline. It avoids complex feat...
Why this score
Less Annoying CRM scores 7.8/10 due to its affordability, simplicity, and essential feature set for small businesses. However, it lacks advanced reporting and customization options that enterprise-level CRMs offer.
Scoring methodology
Zoho CRM is a highly customizable and affordable platform part of the extensive Zoho One business application suite. It offers a wide array of features including sales force automation, multichannel communication, process management, and AI-powered analytics via Zia. It stands out for its flexibilit...
Why this score
Zoho CRM scores 8.5/10 due to its comprehensive feature set, affordability, and flexibility. However, it falls short in some areas like mobile app functionality and customer support.
Scoring methodology
Microsoft Dynamics 365 is a formidable enterprise-grade CRM deeply integrated with the Microsoft ecosystem (Office 365, Teams, Azure). It combines CRM and ERP capabilities, offering modules for Sales, Customer Service, Marketing, and Field Service. Its major advantage is the native use of the Power...
Why this score
Microsoft Dynamics 365 scores 7.8/10 due to its comprehensive feature set, deep integration with Microsoft ecosystem, and advanced analytics capabilities. However, it has high initial costs and may require training for new users.
Scoring methodology
Drip is a powerful email marketing platform specifically designed for Shopify stores, offering advanced personalization and automation capabilities. It excels in creating dynamic content based on customer behavior and preferences. Drips visual workflow builder makes it easy to create complex automa...
Why this score
Drip scores 7.6/10 due to its strong focus on personalized customer journeys and behavior-triggered workflows, but it is limited by higher pricing compared to some competitors and a lack of advanced analytics features.
Scoring methodology
Pipedrive is a sales-centric CRM built by salespeople, focusing on visual pipeline management and activity-driven selling. Its intuitive interface centers on moving deals through customizable stages, with clear visibility into next steps. It emphasizes simplicity and productivity, automating adminis...
Why this score
Pipedrive scores 8.0/10 due to its user-friendly interface and visual pipeline management, which are key strengths. However, the lack of a free plan and limited mobile functionality are weaknesses.
Scoring methodology
WP Engine is a powerhouse in the managed WordPress space, offering a robust platform designed for scale and security. It provides a comprehensive suite of tools for developers, including local development environments, automated migration plugins, and advanced performance monitoring. WP Engine is pa...
Coda blends documents, databases, and applications into a single, powerful canvas. It allows you to create interactive docs with live data, buttons, and automations that connect to tools like Slack and Google Calendar. Its Pack ecosystem extends functionality significantly. Target audience includes...
Why this score
Coda scores 9.4/10 due to its innovative approach in blending documents, databases, and applications into a single canvas, offering interactive elements and robust integrations. However, the learning curve for advanced features and limited customization options slightly affect the score.
Scoring methodology
Smartsheet combines the familiarity of a spreadsheet with robust project management features like Gantt charts, card views, and calendars. It is designed for users who prefer grid-based planning but need automation, reporting, and collaboration tools. Core features include resource management, proof...
Elementor is the most popular page builder plugin for WordPress. It gives you complete control over your site's design using a live, drag-and-drop editor. Because it is a WordPress plugin, it is perfect for those who want to build landing pages directly on their existing site without needing a separ...
Why this score
Elementor scores 8.5/10 due to its extensive customization options, responsive design, and user-friendly interface. However, the higher cost for advanced features and limited mobile app functionality are factors that bring down the score.
Scoring methodology
Trello, an Atlassian product, is the quintessential simple, visual Kanban board tool that can be adapted for lightweight bug tracking. Its model of boards, lists, and cards is instantly understandable. Each bug is a card that can be moved through lists like 'Backlog', 'In Progress', 'Testing', and '...
Why this score
Trello scores 8.9/10 due to its intuitive interface, flexibility in workflow customization, and real-time collaboration features. However, it lacks advanced reporting and automation capabilities.
Scoring methodology
The Wix Editor is a cloud-based website builder designed for individuals and small businesses. Its intuitive drag-and-drop interface allows users to create responsive websites without coding expertise. The platform supports ecommerce functionality and includes built-in tools for search engine optimi...
Why this score
Wix Editor scores 8.0/10 due to its user-friendly interface and robust features, but it has a learning curve for advanced users and higher costs for enterprise plans.
Scoring methodology
Nutshell is a user-friendly, collaborative CRM built for B2B sales teams. It features an intuitive visual sales pipeline, automated email reporting, and team performance insights. It emphasizes ease of use and clear reporting to help managers and reps understand pipeline health. Features include con...
Why this score
Nutshell scores 8.7/10 due to its user-friendly interface and robust features like automated email reporting and team performance insights, but it falls short in areas such as mobile functionality and advanced analytics.
Scoring methodology
Agile CRM is an affordable all-in-one platform combining sales, marketing, and service automation. It includes contact management, email tracking, telephony, help desk, web analytics, and marketing automation workflows in a single dashboard. It's designed to be a cost-effective alternative for small...
Why this score
Agile CRM scores 8.3/10 due to its comprehensive features and affordability for small businesses, but it lacks some advanced reporting capabilities and has occasional performance issues.
Scoring methodology
Airtable is a hybrid spreadsheet-database platform that enables teams to build custom applications for project management, CRM, and more. It stores data in linked tables that can be viewed as grids, Kanban boards, calendars, or galleries. Powerful features include Interfaces for building dashboards,...
Why this score
Airtable scores 8.8/10 due to its flexibility, user-friendly interface, and robust integration capabilities. However, it has limitations in advanced querying options and higher costs for enterprise plans.
Scoring methodology
Adobe XD is a powerful, vector-based design tool deeply integrated into the Adobe Creative Cloud ecosystem, making it a natural choice for designers already using Photoshop, Illustrator, or After Effects. It offers a streamlined interface specifically built for UX design, wireframing, and prototypin...
Why this score
Adobe XD scores 8.5/10 due to its robust prototyping tools, seamless integration with Adobe products, and real-time collaboration features. However, the steep learning curve and limited support for raster images slightly impact its overall score.
Scoring methodology
Apptivo is an integrated suite of business apps centered around its CRM, offering tools for invoicing, project management, help desk, and more. It approaches CRM as part of a broader business management system for small companies. The CRM module handles leads, contacts, and sales pipelines, while co...
Why this score
Apptivo scores 7.8/10 due to its comprehensive suite of business apps, user-friendly interface, and affordable pricing with a free plan. However, it lacks some advanced reporting features and can be less robust compared to enterprise-level CRMs.
Scoring methodologyCopper is a CRM designed exclusively for Google Workspace (G Suite) users, offering deep, seamless integration with Gmail, Google Calendar, and Drive. It minimizes data entry by automatically creating contact records and logging interactions from emails and meetings. It provides relationship intelli...
Why this score
Copper scores 9.3/10 due to its seamless integration and user-friendly interface, but it's limited to Google Workspace users only and lacks advanced customization options.
Scoring methodology
monday sales CRM is built on the popular monday.com Work OS, offering a highly visual and customizable approach to CRM. It transforms the sales pipeline into a collaborative board, tracking leads, communications, and deals. Its strength lies in flexibility; teams can tailor almost every aspect to th...
Why this score
The score of 8.4/10 is driven by its flexibility and visual interface, but it's limited by the higher cost and less robust reporting features.
Scoring methodology
Oracle NetSuite CRM is part of the NetSuite ERP/cloud business suite, offering deeply integrated CRM, ERP, and e-commerce capabilities. Its key advantage is a single, real-time database for customer information, orders, inventory, and financials. This eliminates data silos between front and back off...
Why this score
Oracle NetSuite CRM scores 8.6/10 due to its comprehensive suite of integrated tools and scalability, but it can be expensive and has a steep learning curve.
Scoring methodology
Nimble is a simple yet powerful 'Smart CRM' that excels at unifying contacts from various sources (email, social media, calendars) into a single, intelligent address book. It deeply integrates with Google Workspace and Microsoft 365, adding CRM functionality directly within your inbox. It focuses on...
Why this score
Nimble scores 8.0/10 due to its powerful unification of contact data and seamless integration with major email services, but it falls short in mobile app functionality and has a higher price point compared to some competitors.
Scoring methodology
Insightly uniquely combines CRM with project management, making it a strong choice for service-based businesses and B2B companies that need to manage client relationships and project delivery in one place. It offers robust contact and opportunity management, marketing automation, and deep integratio...
Salesforce Pardot is a powerful CRM tool designed for event management, offering advanced lead generation and marketing automation features. It integrates seamlessly with Salesforce CRM to provide comprehensive customer insights and analytics. Ideal for organizations needing robust tools for managin...
Why this score
Pardot scores 8.5/10 due to its robust marketing automation features, seamless integration with Salesforce CRM, and comprehensive analytics capabilities. However, the steep learning curve and higher cost are factors that could deter some users.
Scoring methodology
MockFlow is a comprehensive suite of tools for the entire product design process, with a strong foundation in wireframing. It offers a dedicated wireframing tool with an extensive library of components and templates for websites, dashboards, and mobile apps. Beyond wireframing, the suite includes to...
Why this score
MockFlow scores 8.7/10 due to its extensive library of components and templates, user-friendly interface, and robust collaboration features. However, it has limitations such as a higher price point compared to some competitors and occasional performance issues.
Scoring methodology
Box is designed specifically for the enterprise market, focusing on secure content management and workflow automation. It goes beyond simple file storage by offering tools for document approval, e-signatures, and complex permission management. It integrates seamlessly with hundreds of enterprise app...
Why this score
Box scores 8.5/10 due to its strong security features, compliance with strict standards like HIPAA and FedRAMP, and robust automation capabilities. However, it can be complex for small businesses and comes at a higher cost compared to some competitors.
Scoring methodology
Capsule CRM is a straightforward, easy-to-use CRM focused on visual pipeline management and contact history. It offers core features like contact and company records, opportunity tracking, tasks, and calendar integration without overwhelming complexity. Its clean interface and sensible defaults make...
Why this score
Capsule CRM scores 8.2/10 due to its user-friendly interface, visual pipeline management, and sensible defaults. However, it lacks some advanced reporting features and robust customer support compared to enterprise-level CRMs.
Scoring methodology
Salesmate CRM is a cloud-based software designed for sales teams needing efficient lead generation and pipeline management. Its mobile-first approach facilitates real-time updates and task tracking for field service representatives and sales reps. The system’s reporting capabilities provide valuable...
Why this score
Salesmate CRM scores 7.4/10 due to its user-friendly interface and mobile-first design, which are strong points. However, the lack of a free plan and limited advanced reporting features bring down the score.
Scoring methodology
Reckon One is an Australian cloud accounting platform with a unique modular pricing model. You pay only for the features you need, such as invoicing, expenses, or bank feeds, making it highly customizable and potentially cost-effective for solopreneurs with specific requirements. It covers core acco...
Why this score
Generally positive user ratings praise affordability, modular pricing, payroll, and bank feeds; limited integrations, uneven support, and a dated interface weaken consensus.
Scoring methodology
Freshsales, part of the Freshworks suite, is a modern, AI-powered CRM designed for high-velocity sales teams. It features an intuitive interface, built-in phone and email, automated lead scoring, and visual sales pipelines. Its AI assistant, Freddy AI, provides predictive contact scoring, next-best-...
Why this score
Freshsales scores 7.5/10 due to its user-friendly interface, built-in communication tools, and AI assistant. However, it lacks extensive customization options and has higher costs for advanced features compared to some competitors.
Scoring methodology
Zendesk Sell (formerly Base CRM) is a sales-focused CRM built for productivity, featuring a powerful built-in phone dialer, email integration, and predictive capabilities. It emphasizes activity-based selling with automation for logging calls and emails. It integrates seamlessly with Zendesk Support...
Why this score
Zendesk Sell scores 8.3/10 due to its robust sales automation features, seamless integration with Zendesk Support, and powerful built-in tools. However, the higher cost for advanced features and a steep learning curve may deter some users.
Scoring methodology
Keap is a leading all-in-one CRM, marketing automation, and payment platform built specifically for small businesses and entrepreneurs. It combines contact management with powerful automated email marketing, sales funnel builders, appointment scheduling, and invoicing. Its core philosophy is to auto...
Why this score
Keap scores 8.3/10 due to its comprehensive suite of tools tailored for small businesses and entrepreneurs, user-friendly interface, and flexible pricing plans. However, it lacks some advanced analytics features found in enterprise-level solutions.
Scoring methodology
SuiteCRM is a popular, open-source fork of SugarCRM Community Edition, offering a fully-featured, self-hosted CRM solution. It provides sales force automation, customer support, and marketing campaign management. Its primary advantage is zero licensing fees and complete control over code and data, m...
Why this score
SuiteCRM scores 8.2/10 due to its open-source nature, zero licensing fees, and strong community support. However, it lacks the out-of-the-box integrations and polished user interface found in commercial CRMs.
Scoring methodology
SugarCRM is a flexible, open-platform CRM solution known for its strong customization capabilities and freedom from vendor lock-in. It offers a full suite of sales, marketing, and service automation tools with a focus on predictive analytics and AI-driven insights to anticipate customer needs. It pr...
Why this score
SugarCRM scores 7.5/10 due to its strong customization capabilities and open-source nature, which are significant strengths. However, the steep learning curve and limited mobile app functionality are drawbacks that bring down the score.
Scoring methodology
Salespad is a CRM software designed to streamline sales processes for small businesses. It offers mobile access and affordable lead management alongside email tracking and pipeline visualization. The platform’s intuitive interface simplifies reporting and helps teams manage customer interactions eff...
Zoho Vault is a business-centric password manager designed for team collaboration and enterprise security. It integrates tightly with the Zoho suite and other SSO providers. Features include automated password resetting, role-based access control, extensive audit trails, and enforcement of password...
Why this score
Zoho Vault scores 8.0/10 due to its robust security features, strong team collaboration capabilities, and integration with the Zoho suite. However, it falls short in terms of user-friendliness and pricing for larger teams.
Scoring methodology
vtiger CRM is an open-source, all-in-one CRM solution encompassing sales, marketing, and support functionalities. It is available in both self-hosted (free) and cloud-based commercial editions. It includes modules for contact management, lead scoring, email marketing, project management, and help de...
Why this score
vtiger scores 7.8/10 due to its comprehensive feature set, open-source nature, and flexibility in customization. However, the steep learning curve and limited out-of-the-box integrations are notable drawbacks.
Scoring methodology
