promptfoo: Open-source tool for testing prompts, models and RAG pipelines and for red teaming, usable in CI/CD, part of OpenAI since 2026. These 11 tools cover the same task (prompt testing). They are ranked by how many of promptfoo's strongest markets they share, then by how complete their profile is.
Built for larger companies and names 2 security certificates, with single sign-on.
Picked from our profile data, which we check against vendor pages. No vendor paid for a placement.
What promptfoo does
promptfoo is an open-source command line tool and library for testing prompts, models and RAG pipelines and for red teaming AI applications. Developer teams use it to catch regressions and security issues before a change ships.
Evaluates prompts, models and RAG pipelines with test cases
Red teaming simulates prompt injection, jailbreaks and data leaks
Tests run in CI/CD, with remediation guidance in pull requests
promptfoo is based in San Francisco and is now part of OpenAI.
Before you switch: promptfoo now belongs to OpenAI, so ask about roadmap, contracting entity and terms before planning long-term use of the enterprise platform. The MIT-licensed CLI remains usable independently. Scans call the models under test, which adds API cost and sends test prompts to those model providers.
PromptLayer is a platform for managing prompts as versioned assets, testing them and monitoring how they perform in production. It lets product, marketing or content experts change prompts without waiting for an engineering release.
Key functions
Versioned prompts that applications fetch without a new deployment
Evaluations with datasets, human review and automated grading
Monitoring of cost, latency and tokens per prompt version
Compared with promptfoo
Publishes a price (from $49 per month); promptfoo quotes on request.
Can store data in the EU; promptfoo states no EU option.
Strong in the same markets as promptfoo: United States.
Check before buying: Production traces can contain user inputs, so decide what is logged and where it is stored. EU hosting, SSO and self-hosting are Enterprise features; smaller plans run in the US cloud. Check request and evaluation limits of the Free and Pro plans against your volume.
Braintrust helps AI product teams evaluate and observe agents: they run experiments against datasets before release, monitor traces in production and turn failures into new test cases.
Key functions
Experiments compare models and prompts with LLM, code or human scoring
Loop generates improved prompts, scorers and datasets
Natural language analysis of production traces with pattern detection
Compared with promptfoo
Publishes a price (from $249 per month); promptfoo quotes on request.
Strong in the same markets as promptfoo: United States.
Check before buying: Data retention is 14 days on Starter and 30 days on Pro, so plan exports if you need longer history. Overage for data and scores is billed on top. SAML SSO is available on Enterprise only. Ask for data location and a data processing agreement, since neither is published.
LangSmith is the commercial platform from LangChain for building and improving LLM agents. Its Prompt & Context Hub stores and versions prompts, and tracing, monitoring and evaluation show how agents behave in production, for engineering teams and the domain experts who edit prompts.
Key functions
Prompt & Context Hub to store, version and promote prompts and agent instructions across environments
Chat (formerly Polly) that analyzes traces, prompts and evaluations, and an AI canvas for rewriting prompts
Online evaluators using an LLM as judge or code that score production traces
Compared with promptfoo
Publishes a price (from $39 per user/month); promptfoo quotes on request.
Can store data in the EU; promptfoo states no EU option.
Strong in the same markets as promptfoo: United States.
Check before buying: Pricing mixes seats with metered usage in LangChain Standard Units, so estimate trace volume with the vendor's calculator. The vendor says it has no EU legal entity for customer contracts, and a DPA is requested through support. Data location depends on the instance: Google Cloud in the US, EU or Asia-Pacific, or AWS in the US. Traces can contain personal data, so apply US state privacy laws, GDPR and HIPAA as relevant.
Opik is an open-source platform from Comet for tracing, evaluating and improving LLM applications and agents. Developers log every step of a run, manage prompts in a versioned library and score outputs with LLM judges, with free cloud and self-hosted options.
Key functions
LLM-as-a-judge evaluation with 30+ metrics such as answer relevance, hallucination and task completion
Prompt optimizer with six optimization algorithms
Ollie, an AI assistant that analyzes traces and suggests fixes
Compared with promptfoo
Publishes a price (from $19 per month); promptfoo quotes on request.
Names 3 security certificates, promptfoo 0.
Strong in the same markets as promptfoo: United States.
Check before buying: Pricing counts spans per month, and retention is 60 days on the Free and Pro plans, so estimate volume first. Hosting region and DPA terms were not on the public pages checked in October 2026, so ask before logging personal data. Certifications, SSO and flexible deployments are listed under Enterprise. US state privacy laws, and HIPAA for health data, apply to what you log.
PromptHub is a web platform where teams store, version, test and deploy prompts, combined with a public community library. It suits product and content teams that want a shared prompt workflow without building internal tooling.
Key functions
AI prompt generator and prompt enhancer
Evaluates prompts across test cases and several models
Pipelines with automated evaluators before production
Compared with promptfoo
Publishes a price (from $9 per user/month); promptfoo quotes on request.
Strong in the same markets as promptfoo: United States.
Check before buying: Private prompts require a paid plan. SOC 2 was listed as in progress on the pricing page in September 2026, and SSO is Enterprise only, so check security requirements early. Prompts and test data flow to the model providers whose keys you add, so each of them needs its own data processing terms.
Prompt flow is a suite of open-source development tools from Microsoft for building, testing, evaluating and deploying LLM applications. It suits teams, especially on Azure, that want a structured path from prototype to production.
Key functions
Flows link language models, prompts, Python code and tools
Tracing of interactions with language models for debugging
Evaluates quality and performance on larger datasets
Compared with promptfoo
Built for larger organizations than promptfoo's smallest customers.
Strong in the same markets as promptfoo: United States.
Check before buying: Check the recommended Python versions against your stack. The local tools are free, but model calls and the Azure AI cloud version are billed by the respective provider. Plan who maintains flows and dependencies, since Microsoft offers this repository without a support contract.
Langfuse is an open-source platform for teams building LLM applications, combining prompt management with tracing, evaluations and analytics. It can be used as a managed cloud with US, EU or Japan regions or self-hosted for free.
Key functions
Versioned prompts with labels such as production, cached in the SDK
Playground for testing prompts in the browser
Experiments on datasets with scoring of results
Compared with promptfoo
Publishes a price (from $29 per month); promptfoo quotes on request.
Can store data in the EU; promptfoo states no EU option.
Headquartered in Germany, promptfoo in United States.
Names 2 security certificates, promptfoo 0.
Check before buying: Choose the EU region if traces contain personal data from EU users, and sign the data processing addendum, which ClickHouse now publishes and which names Langfuse Cloud. Subprocessors are listed on the ClickHouse subprocessor page. SSO requires the Teams add-on on Pro or Enterprise. When traces include employee prompts, check co-determination rules in Germany.
Orq.ai is a European platform for building and running generative AI features, with prompt management, experiments, evaluators and an AI gateway to many model providers. It suits companies that want EU data residency and central control over model use.
Key functions
Versioned prompts reused across playgrounds, experiments, deployments and agents
A/B tests of prompt variants
AI prompt generator for refining prompts
Compared with promptfoo
Publishes a price (from €35 per user/month); promptfoo quotes on request.
Can store data in the EU; promptfoo states no EU option.
Headquartered in Netherlands, promptfoo in United States.
Names 2 security certificates, promptfoo 0.
Check before buying: Estimate costs from three parts: model usage at provider prices, the platform fee on credits or requests, and AI Studio seats. SSO, audit logs, VPC or on-premises deployment and SOC 2 reports are Enterprise features. Request the data processing agreement and subprocessor list through the trust center.
All 11 alternatives by buying criteria
promptfoo alternatives by price, trial, hosting and security
Not stated means we found no statement on the vendor's site. Data as of each profile's last check.
The market around promptfoo: 12 tools for this task
75 % Publish a price (9/12)
100 % Free plan (12/12)
17 % Free trial (2/12)
33 % EU hosting option (4/12)
25 % Headquartered in Europe (3/12)
58 % Single sign-on (7/12)
promptfoo is among the tools that price on request. More than half of the vendors here publish prices, so you can compare list prices before the first demo.
Source: ai-toolfinder.com dataset, full profiles only.
Why teams look beyond promptfoo
promptfoo quotes prices on request. 8 of the alternatives below have a published pricing model.
promptfoo states no EU hosting option. 4 alternatives can store data in the EU.
6 alternatives are strong in at least one of the same countries as promptfoo, so local support and compliance should be comparable.
It depends on your country and company size. In our data, PromptLayer, Braintrust and LangSmith share the most strong markets with promptfoo, so they are the closest fit if you work where promptfoo is strong. Filter the list by country and size to narrow it down.
Is there a free alternative to promptfoo?
PromptLayer, Braintrust, LangSmith, Opik and PromptHub offer a free plan or a free trial according to the vendors. Check the limits of free plans before you rely on them for employee data.
Which promptfoo alternatives can host data in the EU?
PromptLayer, LangSmith, Langfuse and Orq.ai can store customer data in the EU, according to the vendors. Ask for the data processing agreement (Art. 28 GDPR) and the list of subprocessors.
Which promptfoo alternatives publish their prices?
PromptLayer, Braintrust, LangSmith, Opik, PromptHub and Langfuse show prices on their websites, for example PromptLayer from $49 per month and Braintrust from $249 per month. The others quote after a demo.
Are there European alternatives to promptfoo?
Langfuse, Orq.ai and Promptmetheus are headquartered in Europe. A European seat does not guarantee EU hosting, so check the data processing agreement and the list of subprocessors.
Which promptfoo alternatives support single sign-on?
PromptLayer, Braintrust, LangSmith, Opik, PromptHub and Langfuse support single sign-on according to the vendors. Some include it only in higher plans, see the table above.
PromptLayer
