PromptHub vs ProofHound

PromptHub is a community-driven platform for finding, managing, testing, and deploying prompts. Public prompts can be shared with the community; private prompts with teammates are available on paid plans. Git-based versioning tracks prompt changes, and an API supports prompt management and deployment. Evaluations compare outputs across test cases, while pipelines can run checks on commits or merges for secret leaks, profanity, and regressions. Listed model providers include OpenAI, Anthropic, Azure, Google, Meta, Bedrock, and Mistral. Prompts can also be deployed through shareable forms or Zapier. The Free plan includes unlimited public prompts and team members, but not private prompts; it also has 2,000 requests per month and limited API access. Pro costs $12 a month for one user, and Team costs $20 a month per user. Enterprise pricing is custom and not listed. Customers supply their own LLM API keys and pay providers' token costs separately. The pricing page says prompts, variables, and outputs are encrypted at rest and in transit using AES-246, TLSv1.2+, and regularly rotating keys. The company is Tethered Software Inc.

ProofHound is a prompt-optimization platform for LLM classification work, available through an API, self-hosted deployment, or the web. It examines error cases, iterates prompts, validates outputs, and provides controlled deployment and rollback. Dataset uploads accept CSV, TSV, JSONL, JSON arrays, and ZIP files, with field mapping in the interface. Optimization can target overall accuracy or category measures such as recall for high-risk categories and precision for error-prone classes. Immutable prompt versions retain variable configurations, output rules, and differences between revisions. Experiment records include datasets, model configurations, sample judgments, and overall and category metrics. Release controls include gray traffic, A/B testing, full rollout, and one-click rollback. Connections include the web UI, webhooks, API tokens, and MCP. Customers supply their own model provider, and ProofHound says model calls are not charged. A free plan is listed at free, while self-hosted open source is also free.