Agenta vs PromptHub
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.
PromptHub
The most literal "GitHub for prompts" - branching, diffing and merging with a UI non-engineers can use. By far the cheapest option here at $9/mo, with one significant catch on the free tier.
| Agenta | PromptHub | |
|---|---|---|
| Category | Prompt Management | Prompt Management |
| Our rating | 4/5 | 3/5 |
| Starting price | $0 self-hosted | $9/mo |
| Billing meter | No usage metering | request |
| Free plan | Yes | Yes |
| 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. | Teams that want git-style prompt version control on a small budget, particularly where non-engineers need to work with prompts directly and runtime deployment is already handled elsewhere. |
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 PromptHub
PromptHub is the cheapest credible option in this segment by a wide margin and the most literal implementation of prompts-as-code. Branching, diffing and merging works the way you would expect from git, and the diff view alone is worth something - most competitors store prompt versions as opaque blobs you cannot meaningfully compare, which makes reviewing a change guesswork. At $9 a month for Pro against Langtail's $99 and Parea's $150, the value is hard to argue with. Two things to weigh. The free tier has no private prompts, meaning anything you put there is published publicly, which is a genuine trap rather than a limitation. And it is weakest exactly where prompt management usually earns its keep - runtime control. Prompts are versioned and shareable, but what your application actually deploys stays your problem, which is the opposite of PromptLayer's release-label model. The continuity question around a two-person bootstrapped team is real but more nuanced than it first appears.
Full PromptHub review →Frequently Asked Questions
What is the main difference between Agenta and PromptHub?
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. PromptHub: Teams that want git-style prompt version control on a small budget, particularly where non-engineers need to work with prompts directly and runtime deployment is already handled elsewhere. 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 PromptHub?
It depends entirely on your workload shape, because they meter differently - Agenta bills on no usage metering and PromptHub bills on request. Published starting prices are $0 self-hosted and $9/mo 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 PromptHub?
Agenta: Yes, free. PromptHub: No or paid tier only. Free self-hosting means no licence fee, not no cost - you still own the infrastructure, upgrades and on-call.