Helicone
llm-observability
Open-source LLM observability and AI gateway in one line of code.
Pricing
Free plan
Rating
—
Votes
0
Head-to-head comparison
Helicone vs DeepEval
Compare Helicone and DeepEval side by side across pricing, features, ratings, pros, cons, best-fit use cases, and alternatives.
DeepEval
llm-observability
Open-source LLM evaluation framework with pytest-style testing.
Pricing
Free plan
Rating
—
Votes
0
Feature comparison
Feature
Helicone
DeepEval
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
Helicone pros and cons
Extremely easy integration via a one-line base-URL swap
Open source under Apache 2.0 and free to self-host
Tiny Docker image that runs almost anywhere
Gateway features like caching, failover, and rate limiting cut cost and improve reliability
Product is in maintenance mode after the Mintlify acquisition, with no roadmap
Long-term hosted-service viability is uncertain and migration may be needed
Usage-based overages mean the Pro price is a floor, not a cap
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
Which one should you choose?
Best overall signal
Helicone
Selected using Toolglade popularity signals such as views and votes.
Best value signal
Helicone
Selected using free-plan availability and engagement signals.
Best for
Helicone
- quick LLM request logging
- self-hosted observability
- gateway caching and failover
- cost and usage monitoring
- Teams wanting simple, cheap LLM logging
DeepEval
- LLM unit testing
- RAG evaluation
- CI/CD quality gates
- red-teaming and safety checks
- Engineering teams treating evals like tests
FAQ
Is Helicone better than DeepEval?
It depends on your use case. Compare category fit, pricing, feature availability, and ratings before choosing.
Which tool has a free plan?
Helicone and DeepEval offer a free plan based on current Toolglade data.