Impromptо vs Prompt Assay

Impromptо provides PromptOps infrastructure for managing prompts with versioning, team collaboration, and API deployment. Its Playground runs prompts across OpenAI, Anthropic, and Google models simultaneously so users can compare outputs. Every save creates a version, with side-by-side diffs, token count comparisons, and one-click rollback. Team workspaces support Admin, Editor, and Viewer roles, plus activity logs and an audit trail. Applications can use the REST API to fetch an active prompt at runtime, including dynamic variables, so changes can take effect without redeployment. The Free plan includes unlimited prompts, API access, and import and export in JSON and Markdown, but limits Playground use to 50 runs per day and two model panels. Pro Team adds unlimited Playground runs, up to five panels, team workspaces, and priority support. It costs ₹599 a month under the Early Bird Offer; the page also shows ₹1,899. The site says data is encrypted at rest and workspace data is isolated with Row-Level Security.

Prompt Assay is a web and API workbench for authoring, refining, versioning, testing, and shipping LLM prompts and Agent Skills. Its critique feature evaluates clarity, completeness, structure, technique use, robustness, and efficiency, with written reasons. An in-editor AI pair can brainstorm, critique, improve, rewrite, compare, and convert content. Connect your own Anthropic, OpenAI, or Google models to run a prompt across 2–5 models in parallel and compare outputs, latency, token use, and cost; optional LLM-as-Judge scoring is available. For Agent Skills, users can create multi-file bundles, critique them, and run Behavioral Evals across Claude, GPT, and Gemini. Imports accept Markdown, Anthropic JSON, OpenAI JSON, or raw text; its bundle preserves versions, tags, fragments, and metadata. The Free plan is free, with 250 calls monthly and one seat; seven initial platform-funded calls are available before BYOK is needed for ongoing use. Solo costs $49 a month and includes API and TypeScript SDK access. The public API and SDK require Solo or higher.