Prompt Assay vs PromptDocker
Prompt Assay
promptassay.aiPromptDocker
promptdocker.comSide by side
| Figure | Prompt Assay | PromptDocker |
|---|---|---|
| Price from | $49/mo | $29/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 4 |
| Spec score · Prompt Management Software | 7.7 (#17) | 8.8 (#6) |
| API | The public REST API and TypeScript SDK require Solo tier or higher; API requests are authenticated with an API key. | PromptDocker says its API access can push prompts into agents, workflows, or proprietary platforms. |
| Intended users | The maker describes the product for prompt engineers, teams sharing prompt libraries, researchers evaluating models, and developers retrieving prompts through an API or SDK. | The founding-members page lists startup teams, solo builders, consultants, prompt engineers, and low-code users among its intended users. |
| Maker | Jon Lasley founded Prompt Assay; the About page describes his enterprise technology and applied AI experience but does not state a founding year or headquarters. | The maker page says PromptDocker began as a weekend project by a founder frustrated with managing prompts across workflows; it does not name the founder or state a location or founding year. |
| Product | Prompt Assay is a workbench for authoring, refining, versioning, testing, and shipping LLM prompts and Agent Skills. | PromptDocker is a shared workspace for teams to write, test, version, and manage prompts. |
Plans
Prompt Assay
- Solo$49 a month
- Team$99 a month
- EnterprisePriced on request
- FreePrice not published
PromptDocker
- FreeFree
- Pro$29 a month
- EnterprisePriced on request
- Founding MemberPrice not published
In their own words
Prompt Assay
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.
PromptDocker
PromptDocker has no write-up on Specifiction yet; its figures are above.