GrowthBook
- Free allowance
- Starter: free with no credit card; up to 3 users and 1 project, unlimited feature flags, experiments and traffic; 1M CDN requests and 5 GB CDN bandwidth a month; managed warehouse 1M events a month
- Verdict
- caveatusable, with a named limit or an unprobed read path
- Cost
- free tier
- Identity
- emailno card, no phone
- Binding limit
- volume-quota1M CDN requests and 5 GB CDN bandwidth a month (soft guideline); managed warehouse: 1M events a month
- Evidence
- documented34 sources; a first-party page was read and the sentence quoted
- Freshness
- stale on 2026-12-03checked 2026-11-02 (live); stale on 2026-12-03
| Free tier | Starter: free with no credit card; up to 3 users and 1 project, unlimited feature flags, experiments and traffic; 1M CDN requests and 5 GB CDN bandwidth a month; managed warehouse 1M events a month unit mixed; metered on ; The plan is counted in seats (one login each), CDN requests, CDN gigabytes and warehouse events; no single unit term fits. End-user traffic is not counted. The CDN figures are soft guidelines: an outlier is notified and the UI shows a CDN usage exceeded warning. SSO on Starter is Google only and roles are admin only; sequential testing, CUPED and multi-arm bandits are not on Starter. |
|---|---|
| Price | none stated |
| Limits |
3 users and 1 project on Starter; the vocabulary has no kind for a seat count. |
| Binding | volume-quota Flag payloads are served from the CDN, so 1M CDN requests a month is the first ceiling for an app with traffic; it is enforced by notice, not a hard stop. |
| Identity | email The pricing page states no credit card is required and that every user needs an own login and password. The Cloud register form at app.growthbook.io asks for a First Name, a Work Email Address and a Password, or offers Sign up with Google, and lists no phone or card field; GrowthBook documents a role chosen during signup and an organization and a project named when the account is created. Whether a later step asks for a phone number, and whether an address at a public mail domain passes as a Work Email Address, is unverified: behind a sign-up. |
| Egress | CDN delivery of flag payloads: 1M requests and 5 GB of bandwidth a month on Starter as soft guidelines; paid overage is USD 10 per additional million CDN requests and USD 1 per additional… free allowance: 1M CDN requests and 5 GB of CDN bandwidth a month |
| Per-object cap | unverified: no feature or payload size limit is stated on the pages read |
| Retention | unverified: no retention period for managed-warehouse events or audit history is stated on the pages read |
| Interface | rest REST API at https://api.growthbook.io/api with a Secret Key or Personal Access Token over HTTP Basic or Bearer auth, 60 requests per minute (a GET /api/v1/features without a key answered 400 Missing Authorization header); an MCP server hosted for GrowthBook Cloud at https://mcp.growthbook.io/mcp, with sign-in through OAuth. endpoint: https://api.growthbook.io/api |
| Tooling | 24+ SDKs, the setup wizard (npx @growthbook/wizard), an MCP server, or any HTTP client against the REST API. |
| Composes with | Flags and experiments for apps on free compute, analysed in a warehouse the user already has or in the managed warehouse at 1M events a month. |
| Reliability | Usage above the CDN guidelines triggers a notice and a CDN usage exceeded warning in the UI rather than a stop. |
| Notes | Pro is USD 40 per seat a month with 2M CDN requests and 20 GB of CDN bandwidth included. GrowthBook is also open-source software that the user can install and run on a rented or free machine, with unlimited users; that is the last resort after the hosted Starter plan. |
| Evidence note | documented The REST API host was probed and answered 400 Missing Authorization header without a key. The identity kind rests on the login-and-password sentence and on the register form of the Cloud app as rendered in text. |
| Parsed numbers |
|
Evidence 34
| date | source | what it proved |
|---|---|---|
| 2026-10-30 | www.growthbook.io/pricing | Starter is free with no card, up to 3 users, 1 project, unlimited flags, experiments and traffic |
| 2026-10-30 | www.growthbook.io/pricing | Starter is free for up to three users on the cloud platform |
| 2026-10-30 | www.growthbook.io/pricing | each user needs an own login and password |
| 2026-10-30 | www.growthbook.io/pricing | exceeding CDN usage shows a warning |
| 2026-10-30 | www.growthbook.io/pricing | paid overages are USD 10 per million CDN requests and USD 1 per GB |
| 2026-10-30 | www.growthbook.io/pricing | a free self-hosted plan with unlimited users exists |
| 2026-10-30 | www.growthbook.io/pricing | Starter includes 1M CDN requests a month |
| 2026-10-30 | www.growthbook.io/pricing | Starter includes 5 GB of CDN bandwidth a month |
| 2026-10-30 | www.growthbook.io/pricing | the managed warehouse includes 1M events a month on Starter |
| 2026-10-30 | www.growthbook.io/pricing | Starter SSO is Google only |
| 2026-10-30 | www.growthbook.io/pricing | Starter roles are admin only |
| 2026-10-30 | www.growthbook.io/pricing | sequential testing is not on Starter |
| 2026-10-30 | www.growthbook.io/pricing | CUPED is not on Starter |
| 2026-10-30 | www.growthbook.io/pricing | multi-arm bandits are not on Starter |
| 2026-10-30 | www.growthbook.io/pricing | part of the text of Notes, above |
| 2026-10-30 | www.growthbook.io/pricing | 24+ SDKs are available |
| 2026-10-30 | www.growthbook.io/pricing | an MCP server is available |
| 2026-10-31 | www.growthbook.io/legal/fair-use-policy | free organizations are expected to stay within 1M CDN requests and 5 GB |
| 2026-10-31 | www.growthbook.io/legal/fair-use-policy | outlier usage is notified |
| 2026-10-31 | www.growthbook.io/legal/fair-use-policy | end-user traffic is not limited |
| 2026-10-31 | www.growthbook.io/insights/growthbook-starter-plan | Starter is USD 0, no card, 3 users in 1 project |
| 2026-10-31 | docs.growthbook.io/api | the API base URL is api.growthbook.io/api |
| 2026-10-31 | docs.growthbook.io/api | the API takes HTTP Basic or Bearer auth |
| 2026-10-31 | docs.growthbook.io/api | the REST API allows 60 requests a minute |
| 2026-10-31 | docs.growthbook.io/quick-start | a setup wizard exists |
| 2026-10-31 | probe: https://api.growthbook.io/api/v1/features | api.growthbook.io answers a request without a key with Missing Authorization header |
| 2026-11-01 | app.growthbook.io/ | the Cloud register form lists First Name, Work Email Address and Password |
| 2026-11-01 | app.growthbook.io/login | a second render of the Cloud app lists the same register fields |
| 2026-11-01 | app.growthbook.io/ | the register form offers Sign up with Google |
| 2026-11-01 | docs.growthbook.io/integrations/ai-agents/wizard | the signup lets the creator of an organization select a role |
| 2026-11-01 | www.growthbook.io/insights/first-feature-flag | creating a Cloud Starter account names an organization and a project |
| 2026-11-01 | www.growthbook.io/insights/first-feature-flag | a GrowthBook seat is an individual platform user, not an end user who receives flags |
| 2026-11-01 | docs.growthbook.io/integrations/mcp | GrowthBook Cloud has a hosted MCP server that signs in through OAuth |
| 2026-11-01 | docs.growthbook.io/integrations/mcp | the hosted MCP endpoint of GrowthBook Cloud is https://mcp.growthbook.io/mcp |