Companies Using Discourse

How has Discourse performed in the Forum & Community space compared to its competitors? Our technographic data tells a clear story.

1. Growth Trajectory: From 1 Domain to 3,100+ in 11 Years

Our detection data tracks Discourse from its first appearance in February 2013 to a peak of 3,128 active domains in November 2024. Growth was slow in the early years -- it took until late 2017 to reach 479 active domains. Two inflection points stand out. First, a crawl expansion in January 2018 brought a spike to 1,026 domains as we indexed more subdomains. Second, late 2019 through 2024 saw a steady climb from around 770 to 3,100+ domains, fueled by tech companies building developer communities and open-source projects moving away from mailing lists.

The platform now holds 1.28% market share in our broad Forum & Community category. That sounds small, but the category is distorted by WordPress plugins. BbPress at 34.7% runs inside WordPress; Discourse is a standalone application. When you isolate dedicated forum software, the picture changes dramatically: 6sense reports Discourse leads with 32.88% market share and tracks 4,102 companies, while Enlyft counts 5,042 companies. According to Discourse's own metrics, the platform powers 22,000+ communities generating 3M+ posts and 1B+ page views monthly, with the largest individual sites reaching 45M+ monthly views. Among standalone forum platforms (vBulletin, XenForo, phpBB, Flarum), Discourse is the clear leader by every measure. The 6,666 domains that previously used Discourse but no longer do suggest meaningful churn, though some of this reflects test installations and staging environments common with self-hosted open-source software.

Sales Signal: Discourse's steady growth signals a healthy addressable market for developer tools, community management services, and migration consulting. Companies launching new community initiatives are a key prospect segment.

2. Customer Profile: Software Companies and Open-Source Culture

Discourse's customer base is distinctly tech-oriented. 48.6% of customers have 1-10 employees, and combined with the 11-50 range, 73.4% are companies with fewer than 50 people. These are startups, indie software shops, and open-source project teams. The age distribution confirms this: 52.4% of Discourse customers were founded in the 2010s, with another 18.0% from the 2020s. Over 70% are digital-native companies less than 15 years old.

But the enterprise tail is more significant than the percentages suggest. 20 companies with 10,001+ employees use Discourse, including Siemens (1847), Samsung, NVIDIA, BBC, Shopify, and Atlassian. Most deploy Discourse for developer communities or customer support forums -- community.siemens.com, forum.developer.samsung.com, community.shopify.com. Cross-referencing with Discourse's own customers page adds even more enterprise names: Docker (forums.docker.com), GitLab (forum.gitlab.com), Zoom (devforum.zoom.us), Western Digital (community.westerndigital.com), UiPath (forum.uipath.com), Elastic (discuss.elastic.co), Asana (forum.asana.com), Netlify (answers.netlify.com), Brave (community.brave.com), and Monzo (community.monzo.com). Discourse also powers communities for crypto projects like MetaMask, Algorand, Cardano, and Solana, and gaming communities for EVE Online, Unreal Engine, and Infinite Flight. These are multi-verified: they appear in our crawl data, on Discourse's customers page, and on their own public-facing community URLs. The company type split also tells a story: 58.2% privately held, 18.3% nonprofit, and 8.8% public companies, with educational institutions at 3.6%. That 18.3% nonprofit share is unusually high and reflects Discourse's free tier for open-source projects.

Sales Signal: The combination of small tech companies and large enterprise deployments creates two distinct prospect segments. For small companies, the sell is managed hosting and migration from legacy forums. For enterprises. It's custom integrations, SSO, and compliance features.

3. Industry and Geographic Concentration

Software Development dominates at 27.1%, followed by Technology/Internet (10.6%) and IT Services (7.9%). Together, tech-adjacent verticals account for over 45% of the enriched base. This is the most tech-concentrated customer base I've seen across 50+ technology profiles on TechnologyChecker.io. Financial Services at 3.0% and E-Learning at 2.1% are the largest non-tech verticals, with nonprofits and research organizations also well-represented.

Geographically, the United States leads with 43.7%, followed by the UK (8.6%) and Germany (6.7%). Unlike most SaaS tools where English-speaking markets dominate at 80%+, Discourse's open-source roots give it strong European adoption: Germany, France, Netherlands, and Switzerland collectively add 13.7% on top of the Anglosphere. Brazil (1.2%) shows early traction in Latin America, driven in part by Nubank and iFood building Portuguese-language communities.

Sales Signal: European markets, particularly Germany and France, are underserved by English-language community management vendors. Localized Discourse hosting and support services could tap an audience that's already self-hosting. Non-tech verticals like financial services and e-learning represent expansion opportunities beyond the core developer audience.

4. Migration Patterns: Discourse Wins Against Legacy Forums

Platform migration data shows Discourse gaining ground against older forum software. 105 companies switched from bbPress to Discourse while only 39 went the other direction, a 2.7:1 gain ratio. Against vBulletin, the ratio is even more dramatic at 9:1 (45 gained vs. 5 lost), which fits the broader narrative of legacy PHP forums losing ground to modern alternatives.

The Mattermost migration flow is more interesting: 37 companies gained from Mattermost, 36 lost to it, nearly 1:1. This reflects a genuine overlap in use cases -- some organizations treat Discourse and Mattermost as complementary (async forum + real-time chat), while others pick one or the other. The 23 Mattermost-to-Discourse switches in the last year alone is the highest recent inbound number of any competitor, suggesting active evaluation between these two platforms.

Sales Signal: Organizations running vBulletin or bbPress are the lowest-hanging fruit for Discourse migration services. The vBulletin-to-Discourse conversion rate of 9:1 means virtually no one goes back. The Mattermost overlap creates an opportunity for positioning Discourse as the structured knowledge layer alongside real-time chat.

5. The Discourse technology stack

The tech stack data reveals a clear deployment pattern. Nginx at 87.1% and Let's Encrypt at 87.3% reflect the standard Docker-based Discourse installation, which bundles both by default. jQuery (82.3%), Handlebars (72.6%), and Moment.js (70.9%) are core to Discourse's Ember.js frontend.

The analytics layer shows heavy Google adoption: Google Tag Manager (75.0%), Google Analytics (73.1%), and Google Analytics 4 (57.2%). Social integrations are strong across the board, with Twitter (73.2%), Facebook (70.3%), LinkedIn (64.7%), and Slack (37.9%). That Slack number is notable -- over a third of Discourse communities also integrate with Slack, confirming that organizations run both asynchronous forums and real-time chat side by side.

Sales Signal: The 37.9% Slack overlap creates opportunities for integration tools that bridge Discourse and Slack. Security adoption is high (95.9% SSL, 91.8% HSTS, 91.3% SPF), which matters for enterprise procurement conversations. The React overlap at 57.1% suggests many Discourse operators also run modern web applications and may need custom plugin development.

What G2 Reviewers Say

G2 reviewers highlight complete and user-friendly features as the top strength (3 mentions), while duplicate content draws the most criticism (1 mention). For sales teams, the positive sentiment around complete and user-friendly features signals satisfied users who may be open to complementary tools that enhance their current workflow.

6. Company Background and Open-Source Credentials

Discourse was co-founded in 2013 by Jeff Atwood (co-creator of Stack Overflow), Robin Ward, and Sam Saffron. The company has raised $21M in total funding, including a $20M Series A in August 2021 led by Pace Capital and First Round Capital. With approximately 101 employees and over $10M in annual revenue, Discourse operates a lean hybrid model: open-sourcing the core platform while monetizing through managed hosting (plans from $0 to $500+/month). On GitHub, discourse/discourse has 46,500+ stars and 8,800+ contributors, making it one of the most actively maintained open-source community platforms. The GPL-2.0 license, Ruby on Rails backend, and Ember.js frontend attract a technically sophisticated contributor base.

Sales Signal: The combination of $21M in VC backing, 101 employees, and a free tier that feeds paid conversions suggests a sustainable business model. For vendors selling to Discourse users, the free-to-paid upgrade path (especially from the free tier's 500K pageview limit to the $100/month Pro plan) represents a natural trigger point for complementary tooling.

Key Takeaways

Discourse occupies a unique position in the forum market: a modern, open-source platform founded by Stack Overflow's Jeff Atwood that serves both indie developers and global enterprises. Its 1.28% category share in our broad taxonomy understates its influence -- 6sense puts it at 32.88% of dedicated forum software. The platform powers 22,000+ communities with 1B+ monthly page views, backed by $21M in VC funding and a 101-person team. The customer base is overwhelmingly tech-focused (45%+ in software and IT), skews small (73.4% under 50 employees), and clusters in English-speaking markets plus tech-heavy European countries. Major names from Discourse's own customers page -- including Docker, GitLab, Zoom, OpenAI, Western Digital, and MetaMask -- validate its enterprise credibility alongside our technographic detection. Migration data confirms the platform is winning against legacy forums, with a 9:1 gain ratio over vBulletin. The high nonprofit share (18.3%) and educational institution presence reflect Discourse's open-source philosophy and free hosting for qualifying projects.

Sales Applications

Prospecting template: "Hi [Name], I noticed [Company] runs a community on [current platform]. Our data at TechnologyChecker.io shows that 105 companies have migrated from bbPress to Discourse in recent years, with a 2.7:1 gain ratio. If you're evaluating a platform upgrade. We track 2,242 enriched Discourse customers you can benchmark against -- filtered by your industry, size, and tech stack."

Targeting strategy: On TechnologyChecker.io, filter for companies using vBulletin or bbPress in the Software Development or IT Services industries with 11-50 employees. These match the core Discourse adopter profile and represent the highest-probability migration candidates.

Competitive angle: The near-1:1 Discourse-Mattermost migration flow means companies evaluating real-time vs. Async community tools are actively in-market. Position Discourse as the structured knowledge layer that complements (not replaces) Slack or Mattermost.

Explore the full dataset at TechnologyChecker.io and filter by industry, company size, geography, and tech stack across 3,013 Discourse domains with 2,242 enriched company profiles. For additional context, compare our data with 6sense's 4,102 company count, Enlyft's 5,042 company tracking, and Discourse's own customer showcase.