Maxim AI vs Promptfoo
Maxim AI
getmaxim.ai
Promptfoo
promptfoo.devSide by side
| Figure | Maxim AI | Promptfoo |
|---|---|---|
| Price from | $29/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · LLM Evaluation Tools | 8.1 (#8) | 8.4 (#6) |
| Spec score · AI Prompt Management Software | 8.3 (#9) | 8.7 (#5) |
| Spec score · AI Agent Evaluation Tools | 8.1 (#12) | 8.4 (#11) |
| Spec score · Prompt Engineering Tools | 8.2 (#11) | 8.5 (#10) |
| Spec score · AI LLM Evaluation Tools | 8.1 (#15) | 8.4 (#13) |
| Spec score · LLM Observability Tools | 8.1 (#18) | 8.3 (#13) |
| Company | The company page describes Maxim as building enterprise-grade AI evaluation and observability infrastructure; the site footer identifies H3 Labs Inc. | Promptfoo says it is based in San Francisco, California, and is now part of OpenAI while remaining open source. |
| Founded | 2023 | 2024 |
| Headquarters | San Francisco, California, United States | Promptfoo identifies San Francisco, California as its base and headquarters. |
| Integrations | The site lists LangChain, LangGraph, OpenAI, OpenAI Agents, LiveKit, Crew AI, Agno, LiteLLM, Anthropic, Bedrock, and Mistral integrations. | Documented integrations include LangChain, LangGraph, CrewAI, MCP, Splunk, Burp Suite, GitHub Actions, GitLab, Jenkins, CircleCI, Azure Pipelines, and Bitbucket Pipelines. |
| Product | Maxim is an end-to-end evaluation and observability platform for simulating, evaluating, and monitoring AI agents. | Promptfoo helps developers and enterprises build secure, reliable AI applications. |
| Support | Developer and Professional plans list email support, Business lists private Slack support, and Enterprise lists a dedicated customer success manager. | Community support is provided through chat and GitHub issues, while Enterprise includes professional services and dedicated Slack support. |
Plans
Maxim AI
- DeveloperFree
- Professional$29 a month
- Business$49 a month
- EnterprisePriced on request
In their own words
Maxim AI
Maxim AI is an evaluation and observability platform for teams building AI agents. Its prompt IDE lets teams try prompts, models, tools, and context, manage prompt versions, create low-code chains, and deploy prompts without code changes. Teams can simulate agents in varied scenarios and assess them with preset or custom metrics. In production, workflow traces, live debugging, online evaluations, and regression alerts help teams monitor agents. Evaluators include LLM-as-a-judge, statistical, programmatic, and human options; teams can use synthetic or custom multimodal datasets. Product managers can define and analyze evaluations in a no-code UI, while developers can use SDKs, a CLI, and webhooks. SDKs are listed for Python, TypeScript, Java, and Go. Maxim supports web, API, and self-hosted deployment, with enterprise VPC deployments available. The Developer plan is free; Professional costs $29/user/mo and a 14-day trial is available. The free plan has up to 3 seats, 1 workspace, 10k monthly logs, and 3-day data retention.
Promptfoo
Promptfoo helps developers and enterprises evaluate prompts and test AI applications for security risks. It compares prompt outputs across multiple models in a web view. Red-team testing simulates users to look for prompt injections, jailbreaks, data leaks, business rule violations and insecure agent tool use. Its getting-started guide lists more than 60 providers, including OpenAI, Anthropic, Google and local models such as Ollama. Integrations include CI systems such as GitHub Actions, GitLab CI, Jenkins, Azure Pipelines, CircleCI and Bitbucket Pipelines, plus Splunk, Burp Suite, Google Sheets and MCP. Installation is available through npm, npx or Homebrew. Promptfoo requires Node.js 22.22.0 or newer and recommends Node.js 24 LTS. The free Community plan includes all LLM evaluation features and 10k red-team probes per month, and can run locally or be self-hosted. Enterprise includes managed cloud deployment; On-Premise runs on customer infrastructure. Promptfoo says it is based in San Francisco, is now part of OpenAI and remains open source.