Agenta vs Freeplay
Both are prompt management tools. Here is how they actually differ on price, billing model and deployment.
Agenta
An MIT-licensed LLMOps platform bundling prompt management, evaluation, human annotation and observability, with a visual playground for side-by-side comparison. Actively shipping, self-hostable, and broader than most open-source competitors.
Freeplay
An end-to-end platform built for cross-functional AI teams, letting non-engineers deploy prompt and model changes without code. Well funded and self-hostable, but publishes no pricing at all.
| Agenta | Freeplay | |
|---|---|---|
| Category | Prompt Management | Prompt Management |
| Our rating | 4/5 | 4/5 |
| Starting price | $0 self-hosted | Not published |
| Billing meter | No usage metering | No usage metering |
| Free plan | Yes | No |
| Free self-hosting | Yes, free | No or paid tier only |
| Best for | Teams that want one self-hosted MIT-licensed platform covering prompts, evaluation and observability, and who value environment promotion and branching over best-in-class depth in any single area. | Cross-functional product teams where non-engineers own prompt iteration and need to ship changes without a deploy, and who can work with enterprise procurement rather than self-serve pricing. |
Our verdict on Agenta
Agenta is the broadest MIT-licensed option in this segment and a sensible default if you want one self-hosted tool rather than three. It covers prompt management, automated evaluation, human annotation and observability, with an interactive playground for side-by-side comparison and support for 50+ providers including self-hosted models. The versioning model is better than most - branching and environment promotion means you can develop a prompt on a branch and promote it through environments rather than just rolling back a linear history, which is closer to how you already ship software. It is actively maintained, with v0.82.0 shipping in February 2026 and roughly 4,200 stars. The trade-off is depth. The evaluation surface is lighter than DeepEval or Ragas and the observability lighter than Langfuse, so a team with a serious requirement in either area will end up pairing it with something. One note on reading their material - Agenta publishes competitor comparisons, and we found their licensing claim about Latitude to be wrong in a way that disadvantages a rival.
Full Agenta review →Our verdict on Freeplay
Freeplay is one of the better-designed platforms in this segment and its central idea is right - it versions prompts, models and hyperparameters together as a single artefact. That matters more than it sounds, because a prompt tuned against one model is not the same thing when the model changes underneath it, and tools that version the prompt alone will happily let you carry a carefully tuned instruction onto a model it was never tested against. Freeplay treating the configuration as one unit avoids a whole class of silent regression. It is also genuinely built for cross-functional teams, letting product managers and subject matter experts deploy changes without code, and Automated Review Insights - which clusters human annotations and judge scores into themes - solves a real problem, since raw annotation output at volume is data nobody reads. The obstacle is access. There is no published pricing at all, and third-party reports suggest a high entry point we could not verify. For an enterprise that is normal; for a team comparing options in an afternoon it removes Freeplay from consideration before the product is assessed.
Full Freeplay review →Frequently Asked Questions
What is the main difference between Agenta and Freeplay?
Agenta: Teams that want one self-hosted MIT-licensed platform covering prompts, evaluation and observability, and who value environment promotion and branching over best-in-class depth in any single area. Freeplay: Cross-functional product teams where non-engineers own prompt iteration and need to ship changes without a deploy, and who can work with enterprise procurement rather than self-serve pricing. Both sit in Prompt Management, so the decision usually comes down to billing model and deployment rather than raw capability.
Which is cheaper, Agenta or Freeplay?
It depends entirely on your workload shape, because they meter differently - Agenta bills on no usage metering and Freeplay bills on no usage metering. Published starting prices are $0 self-hosted and Not published respectively, but those numbers are not comparable until you apply them to the same traffic. Use our cost calculator to model both against your own request volume and span count.
Can I self-host Agenta or Freeplay?
Agenta: Yes, free. Freeplay: No or paid tier only. Free self-hosting means no licence fee, not no cost - you still own the infrastructure, upgrades and on-call.