DeepEval
llm-observability
Open-source LLM evaluation framework with pytest-style testing.
Pricing
Free plan
Rating
—
Votes
0
Head-to-head comparison
DeepEval vs Vellum
Compare DeepEval and Vellum side by side across pricing, features, ratings, pros, cons, best-fit use cases, and alternatives.
Vellum
llm-observability
Build, evaluate, and deploy LLM apps and agents with confidence.
Pricing
Free plan
Rating
—
Votes
0
Feature comparison
Feature
DeepEval
Vellum
Category
llm-observability
llm-observability
Pricing
Free plan
Free plan
Free plan
API access
Mobile app
Browser extension
Team collaboration
Custom training
Self-hosted option
Offline mode
Multi-language support
DeepEval pros and cons
pytest-style workflow fits developer habits
50+ research-backed metrics out of the box
Apache-2.0 and free to use
Covers RAG, agents, conversations, and safety
Eval reliability depends on judge model/config
Competitive, crowded evaluation category
Richer collaboration features require Confident AI cloud
Vellum pros and cons
Combines prompt, workflow, evaluation, and deployment in one platform
Visual workflow builder lowers the barrier for cross-functional collaborators
Solid evaluation and testing tooling for pre-production quality gates
Multi-provider model support avoids lock-in
Pricing is opaque and sales-led, making budgeting hard
Not open source, and self-hosting is locked to Enterprise
Free tier is quite limited in credits, documents, and seats
Which one should you choose?
Best overall signal
Vellum
Selected using Toolglade popularity signals such as views and votes.
Best value signal
DeepEval
Selected using free-plan availability and engagement signals.
Best for
DeepEval
- LLM unit testing
- RAG evaluation
- CI/CD quality gates
- red-teaming and safety checks
- Engineering teams treating evals like tests
Vellum
- collaborative agent building
- prompt evaluation and testing
- deploying LLM features
- cross-functional AI teams
- Teams wanting an all-in-one build-evaluate-deploy platform
FAQ
Is DeepEval better than Vellum?
It depends on your use case. Compare category fit, pricing, feature availability, and ratings before choosing.
Which tool has a free plan?
DeepEval and Vellum offer a free plan based on current Toolglade data.