Braintrust vs PromptVersions
Braintrust
braintrust.devPromptVersions
promptversions.comSide by side
| Figure | Braintrust | PromptVersions |
|---|---|---|
| Price from | $249/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 4 | 3 |
| Spec score · Prompt Management Software | 9.2 (#2) | 7.1 (#24) |
| Spec score · AI Prompt Management Software | 9.2 (#2) | 7.1 (#23) |
| Evaluations | Teams can run experiments against datasets and score outputs with language models, code or human reviewers. | Users can define metrics and test cases, then batch-evaluate a version or run evaluations automatically on every save. |
| Intended users | Braintrust says its platform is for teams running agents in production, from early-stage shipping through enterprise scale. | The maker describes the product as built for prompt engineers and says it supports product managers, writers, and analysts who edit prompts. |
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.
PromptVersions
PromptVersions has no write-up on Specifiction yet; its figures are above.