# Top Free Knowledge Base Software ## How Many Knowledge Base Software Products Does G2 Track? **Total Products under this Category:** 233 ### Category Stats (Jul 2026) - **Average Rating:** 4.47/5 (↑0.01 vs Jun 2026) The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** KMS Lighthouse (+2.86%) - Among all products in this category, KMS Lighthouse recorded the largest rating increase compared to last month _Last updated: July 26, 2026_ ## How Does G2 Rank Knowledge Base Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 94,600+ Authentic Reviews - 233+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. [ Slack ](https://www.g2.com/products/slack/reviews) By [Salesforce](https://www.g2.com/sellers/salesforce) [ 4.5/5(39,211) ](https://www.g2.com/products/slack/reviews) What do users say? Users consistently praise Slack for its organized communication and intuitive interface, which streamline team collaboration and make it easy to manage conversations across channels. The platform's ab Pros and Cons [ Ease of Use (3483) ](https://www.g2.com/products/slack/reviews?qs=pros-and-cons)[ Notification Issues (1114) ](https://www.g2.com/products/slack/reviews?qs=pros-and-cons) [ Notion ](https://www.g2.com/products/notion/reviews) By [Notion](https://www.g2.com/sellers/notion-7effc4fe-47b3-4888-8ef0-ce4addda94db) [ 4.6/5(13,232) ](https://www.g2.com/products/notion/reviews) What do users say? Users consistently praise Notion for its flexibility and ease of use, allowing them to customize workflows and organize information effectively. The integration of AI features enhances productivity, m Pros and Cons [ Ease of Use (4751) ](https://www.g2.com/products/notion/reviews?qs=pros-and-cons)[ Learning Curve (1895) ](https://www.g2.com/products/notion/reviews?qs=pros-and-cons) [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. [ Learn More ](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) [ Confluence ](https://www.g2.com/products/confluence/reviews) By [Atlassian](https://www.g2.com/sellers/atlassian) [ 4.1/5(4,364) ](https://www.g2.com/products/confluence/reviews) What do users say? Users consistently praise Confluence for its centralized knowledge management and seamless collaboration features, which help teams keep documentation organized and accessible. The integration with Ji Pros and Cons [ Ease of Use (299) ](https://www.g2.com/products/confluence/reviews?qs=pros-and-cons)[ Not Intuitive (84) ](https://www.g2.com/products/confluence/reviews?qs=pros-and-cons) [ ClickUp ](https://www.g2.com/products/clickup/reviews) By [ClickUp](https://www.g2.com/sellers/clickup) [ 4.6/5(13,341) ](https://www.g2.com/products/clickup/reviews) What do users say? Users consistently praise ClickUp for its flexibility and customization, allowing teams to tailor workflows to their specific needs. The platform's ability to integrate various tools and manage tasks Pros and Cons [ Ease of Use (4219) ](https://www.g2.com/products/clickup/reviews?qs=pros-and-cons)[ Missing Features (2039) ](https://www.g2.com/products/clickup/reviews?qs=pros-and-cons) [ Guru ](https://www.g2.com/products/guru/reviews) By [Guru](https://www.g2.com/sellers/guru) [ 4.7/5(2,322) ](https://www.g2.com/products/guru/reviews) What do users say? Users consistently praise Guru for its ease of use and seamless integration with existing workflows, making it a reliable tool for accessing verified information quickly. The platform's ability to cen Pros and Cons [ Ease of Use (742) ](https://www.g2.com/products/guru/reviews?qs=pros-and-cons)[ Search Functionality (152) ](https://www.g2.com/products/guru/reviews?qs=pros-and-cons) [ Helpjuice ](https://www.g2.com/products/helpjuice/reviews) By [Helpjuice](https://www.g2.com/sellers/helpjuice) [ 4.7/5(380) ](https://www.g2.com/products/helpjuice/reviews) What do users say? Users consistently praise the intuitive interface and responsive customer support of Helpjuice, highlighting how easy it is to create and manage content. The platform's strong search functionality and Pros and Cons [ Ease of Use (80) ](https://www.g2.com/products/helpjuice/reviews?qs=pros-and-cons)[ Limited Customization (22) ](https://www.g2.com/products/helpjuice/reviews?qs=pros-and-cons) [ GitBook ](https://www.g2.com/products/gitbook/reviews) By [GitBook](https://www.g2.com/sellers/gitbook) [ 4.8/5(198) ](https://www.g2.com/products/gitbook/reviews) What do users say? Users consistently praise GitBook for its intuitive interface and clean design, which make creating and organizing documentation straightforward. The platform's seamless integration with GitHub and re Pros and Cons [ Ease of Use (11) ](https://www.g2.com/products/gitbook/reviews?qs=pros-and-cons)[ Software Bugs (2) ](https://www.g2.com/products/gitbook/reviews?qs=pros-and-cons) [ Document360 ](https://www.g2.com/products/document360/reviews) By [Kovai Limited](https://www.g2.com/sellers/kovai-limited) [ 4.7/5(540) ](https://www.g2.com/products/document360/reviews) What do users say? Users consistently praise the user-friendly interface and powerful search functionality of Document360, which streamline the documentation process and enhance collaboration. The platform's intuitive d Pros and Cons [ Ease of Use (46) ](https://www.g2.com/products/document360/reviews?qs=pros-and-cons)[ Missing Features (11) ](https://www.g2.com/products/document360/reviews?qs=pros-and-cons) [ Hudu ](https://www.g2.com/products/hudu/reviews) By [Hudu](https://www.g2.com/sellers/hudu) [ 4.7/5(357) ](https://www.g2.com/products/hudu/reviews) What do users say? Users consistently praise Hudu for its ease of use and customization options, which allow for efficient documentation management tailored to specific needs. The platform's ability to centralize inform Pros and Cons [ Ease of Use (207) ](https://www.g2.com/products/hudu/reviews?qs=pros-and-cons)[ Missing Features (75) ](https://www.g2.com/products/hudu/reviews?qs=pros-and-cons) [ Lark ](https://www.g2.com/products/lark-lark/reviews) By [Lark Technologies](https://www.g2.com/sellers/lark-technologies-ab8d4472-aa71-4552-8d1c-06f9cf7661e6) [ 4.5/5(180) ](https://www.g2.com/products/lark-lark/reviews) What do users say? Users consistently praise Lark for its ease of use and integrated features that streamline communication and collaboration. The platform effectively combines messaging, video calls, and document manag Pros and Cons [ Remote Work (15) ](https://www.g2.com/products/lark-lark/reviews?qs=pros-and-cons)[ Glitches (5) ](https://www.g2.com/products/lark-lark/reviews?qs=pros-and-cons) [ BoldDesk ](https://www.g2.com/products/bolddesk/reviews) By [Syncfusion](https://www.g2.com/sellers/syncfusion) [ 4.5/5(146) ](https://www.g2.com/products/bolddesk/reviews) What do users say? Users consistently praise the intuitive interface and powerful automation features of BoldDesk, which streamline ticket management and enhance team collaboration. The platform's ease of use allows tea Pros and Cons [ Ease of Use (41) ](https://www.g2.com/products/bolddesk/reviews?qs=pros-and-cons)[ Missing Features (13) ](https://www.g2.com/products/bolddesk/reviews?qs=pros-and-cons) [ livepro Knowledge Management ](https://www.g2.com/products/livepro-knowledge-management/reviews) By [livepro](https://www.g2.com/sellers/livepro) [ 4.8/5(168) ](https://www.g2.com/products/livepro-knowledge-management/reviews) What do users say? Users consistently praise the user-friendly interface and excellent support provided by Livepro Knowledge Management, which simplifies knowledge access and management. The intuitive design allows for Pros and Cons [ Ease of Use (73) ](https://www.g2.com/products/livepro-knowledge-management/reviews?qs=pros-and-cons)[ Inefficient Search (10) ](https://www.g2.com/products/livepro-knowledge-management/reviews?qs=pros-and-cons) [ Aha! ](https://www.g2.com/products/aha/reviews) By [Aha! Labs](https://www.g2.com/sellers/aha-labs) [ 4.4/5(365) ](https://www.g2.com/products/aha/reviews) What do users say? Users consistently praise Aha! for its customization options and powerful features that enhance project management and product planning. The platform's ability to integrate with tools like Jira and Az Pros and Cons [ Customer Support (26) ](https://www.g2.com/products/aha/reviews?qs=pros-and-cons)[ Learning Curve (13) ](https://www.g2.com/products/aha/reviews?qs=pros-and-cons) [ TextExpander ](https://www.g2.com/products/textexpander/reviews) By [Text Expander](https://www.g2.com/sellers/text-expander) [ 4.8/5(504) ](https://www.g2.com/products/textexpander/reviews) What do users say? Users consistently praise the product for its ease of use and ability to save time by automating repetitive typing tasks. Many appreciate how it streamlines communication and enhances productivity, al Pros and Cons [ Ease of Use (117) ](https://www.g2.com/products/textexpander/reviews?qs=pros-and-cons)[ Software Bugs (30) ](https://www.g2.com/products/textexpander/reviews?qs=pros-and-cons) [ Tettra ](https://www.g2.com/products/tettra/reviews) By [Tettra](https://www.g2.com/sellers/tettra) [ 4.7/5(161) ](https://www.g2.com/products/tettra/reviews) What do users say? Users consistently praise Tettra for its intuitive interface and ease of use, which simplifies knowledge management and document organization. The platform's effective search functionality allows quic Pros and Cons [ Ease of Use (26) ](https://www.g2.com/products/tettra/reviews?qs=pros-and-cons)[ Inefficient Search Functionality (3) ](https://www.g2.com/products/tettra/reviews?qs=pros-and-cons) [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. 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