Braintrust vs Prompt Bunker
Braintrust
braintrust.devPrompt Bunker
promptbunker.comSide by side
| Figure | Braintrust | Prompt Bunker |
|---|---|---|
| Price from | $249/mo | $8/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 4 | 2 |
| Spec score · Prompt Management Software | 9.2 (#2) | 8.1 (#12) |
| Product | Braintrust describes itself as an active observability platform for AI agents that helps teams inspect production behavior and improve agent quality. | Prompt Bunker is a workspace for organizing AI prompts and turning them into repeatable team workflows. |
| Security | Braintrust states that it is SOC 2 Type II certified and GDPR and HIPAA compliant, and offers SSO, RBAC, and hybrid deployment options. | The privacy policy says Prompt Bunker uses reasonable technical and organizational measures to protect account and workspace data, while noting absolute security cannot be guaranteed. |
| Support | The pricing page lists community support, priority support, and shared Slack channel support across its plans. | The Pro plan includes priority support and faster feature access. |
Plans
In their own words
Braintrust
Braintrust is an observability platform for teams running AI agents in production. It lets teams inspect agent traces and tool calls while tracking latency, cost, and quality in real time. Users can evaluate datasets, compare prompts and models, and score outputs with LLMs, code, or human reviewers. Discovery tools surface patterns in production traces to help investigate agent behavior, and the Loop agent can run evaluations, generate test cases, and iterate on prompts autonomously. Braintrust lists native SDKs for Python, TypeScript, Go, Ruby, C#, and more, and its MCP server lets coding agents query logs, run evaluations, and update prompts from an IDE. Security options listed include SSO, RBAC, and hybrid deployment; Braintrust states that it is SOC 2 Type II certified and GDPR and HIPAA compliant. Starter is free, with 1 GB processed data, 10,000 scores, and 14-day retention. Pro costs $249.00 per month; Enterprise pricing is custom.
Prompt Bunker
Prompt Bunker has no write-up on Specifiction yet; its figures are above.