Promptster vs Vellum
Promptster is for comparing models. Vellum is for building LLM apps.
Vellum is a full LLM app development platform with workflow builders, prompt management, and deployment pipelines. It\u2019s a heavier tool aimed at teams building production AI applications \u2014 not developers who want to quickly compare model outputs and costs.
| Feature | Promptster | Vellum |
|---|---|---|
| Primary focus | Model comparison | LLM app platform |
| Setup time | 30 seconds | Onboarding required |
| Multi-provider comparison | 2\u201311 providers | Varies by tier |
| Token markup | Zero (BYOK) | Tier-dependent |
| AI consensus analysis | Yes | No |
| Workflow builder | No | Yes |
| Deployment pipelines | No | Yes |
| Prompt versioning | Yes | Yes |
| MCP for AI editors | 10 tools | No |
| Scheduled monitoring | Yes | No |
| Starting price | Free | Free (limited) |
| Paid plans | $9\u201329/mo | $50\u2013200/mo |
Why Choose Promptster
- Instant Setup: Start comparing providers in 30 seconds. Vellum requires onboarding and platform configuration before you can test anything.
- 10x More Affordable: Free to start, $9\u201329/mo for full features. Vellum starts at $50/mo with limited provider support at lower tiers.
- Purpose-Built for Comparison: Designed specifically for multi-provider testing with cost optimization, consensus analysis, and quality scoring.
Choose Promptster When
- You want fast, cost-transparent multi-provider comparison
- You\u2019re evaluating which provider to use before building
- You need a lightweight tool without platform overhead
- You want MCP integration for AI coding assistants
- Budget-conscious \u2014 free to start with $9\u201329/mo plans
Choose Vellum When
- You\u2019re building production LLM applications with complex workflows
- You need deployment pipelines and workflow orchestration
- Your team requires enterprise collaboration features
- You need visual workflow builders for LLM chains