Promptster vs Braintrust
Compare AI providers in 30 seconds. No SDK. No instrumentation. Just paste your prompt.
End-to-end platform for evals, observability, and prompt management. Backed by a16z with $45M in funding.
| Feature | Promptster | Braintrust |
|---|---|---|
| Multi-provider side-by-side | All major providers | Playground only |
| Setup time | 30 seconds | SDK integration |
| Cost comparison | Yes | Via tracing |
| AI consensus analysis | Yes | No |
| Scheduled monitoring | Yes | Online evals |
| MCP for AI editors | 10 tools | 4 tools |
| Shareable links | Yes | No |
| Eval datasets | No | Yes |
| Production tracing | No | Yes |
| CI/CD quality gates | GitHub Action | Yes |
| Starting price | Free | Free (14-day retention) |
| Paid plans | $9\u201329/mo | $249/mo |
Why Choose Promptster
- Instant Setup: Paste an API key and run your first comparison in 30 seconds. No SDK installation or code instrumentation required.
- 5x Cheaper: Full-featured plans from $9/mo vs $249/mo. Built for individual developers and small teams.
- True Side-by-Side: Compare multiple providers simultaneously with winner badges, radar charts, and cost optimization recommendations.
Choose Promptster When
- You want to quickly compare AI providers before committing
- You\u2019re an individual developer or small team
- You need a simple web UI with no setup overhead
- Cost optimization is a priority
- You want MCP integration for AI coding assistants
Choose Braintrust When
- You need production observability and tracing
- You have a large team requiring enterprise features (SSO, RBAC)
- You need automated eval datasets from production data
- Your workflow requires blocking deploys on eval score regressions