ContextVault vs PromptShark

ContextVault and PromptShark are both inference engines & infra tracked by AIDiveForge. Below is a side-by-side comparison of pricing, capabilities, platforms, and ownership — sourced from each tool's live website and verified before publishing.

ContextVault

The core mechanic is an MCP-compatible vault that Claude, ChatGPT, Codex, Copilot, and any other compatible client reads from and writes to — so the fix one developer's session surfaces becomes findable by the next. Retrieval combines vector and full-text ranking tuned for code and ops recall, which means a keyword search and a semantic search run together rather than forcing you to choose. Memory is scoped at the user, group, and org level with audit trails, so the right context reaches the right team without bleeding across projects. The ceiling arrives when you need the vault to act — ContextVault stores and retrieves, it does not plan or execute. Teams that want autonomous task chains will build that layer themselves and use ContextVault as the knowledge store underneath.

PromptShark

PromptShark is a local MITM proxy written in Go and C++ that sits between your agent and any OpenAI-compatible API endpoint. Every request and response pair is captured, logged, and surfaced in a real-time dashboard — no changes to your agent code, just a single base_url swap. The loop detector flags infinite tool-calling cycles automatically. The time-travel replay feature lets you re-run or edit any historical API step without firing a live request, which means no extra token spend during debugging. The self-hosted, MIT-licensed architecture means your prompts and API keys never leave your own infrastructure.

Attribute	ContextVault	PromptShark
Pricing	Paid	Free
Free trial	7 days	No
Open source	No	Yes
Has API	Yes	Yes
Self-hosted option	No	Yes
Platforms	Web, VS Code, Cursor, JetBrains, Microsoft Visual Studio, Claude Desktop, ChatGPT Desktop, Copilot Desktop	Cross-platform (Go binary + Docker)
Pros	MCP-compatible connections to Claude, Codex, ChatGPT, Copilot, and major code editors, so your team's memory layer doesn't fragment when different developers prefer different AI clients. Hybrid vector and full-text retrieval in a single query, which means you don't lose relevant results because the phrasing in the vault doesn't exactly match what you typed today. Group-scoped access with audit trails and database-level isolation, so a team sharing a workspace doesn't accidentally surface another group's sensitive context in their queries. Durable memory across session resets, model changes, and tool switches, which means a hard-won debugging fix isn't lost the moment a chat window closes or a developer switches from Claude to Codex. Organization-level knowledge retention rather than per-user silos, so when a consultant leaves or a team rotates, the institutional knowledge they built with AI stays queryable.	Zero-instrumentation integration via a single base_url swap, so you get full request visibility without touching your agent's codebase or adding an SDK dependency. Automatic infinite tool-calling loop detection, which means runaway agent cycles are flagged before they drain your token budget rather than after you read the invoice. Per-step token usage and USD cost tracking surfaced in real time, so you can attribute spend to specific agent decisions rather than receiving an opaque monthly total. Time-travel replay lets you re-run and edit any past API step without issuing a live request, so iterating on a prompt variant costs nothing in tokens during a debugging session. MIT-licensed and fully self-hostable via Docker, which means your prompts, responses, and API keys remain on your own infrastructure with no third-party data handling.
Cons	ContextVault retrieves; it does not act. Teams that need their memory layer to trigger follow-up tasks, run tool calls, or chain steps will find a passive store insufficient — at that point they are building an agent layer on top and maintaining ContextVault as one component of a larger system they did not plan for. No self-hosted option exists, per the vendor page. Teams in regulated industries where data-residency policy requires on-premises or private-cloud deployment will fail a security review before completing a proof of concept, and the likely path is a vector database they run themselves — Weaviate, Qdrant, or pgvector — rather than this service. Memory and query caps on lower tiers create a hard ceiling for teams with moderate-to-high query volume. Unlimited memories and queries are a paid-only feature, which means a small team that hits the ceiling mid-sprint faces an unplanned upgrade decision or a gap in retrieval coverage.	The proxy is scoped to OpenAI-compatible API calls; agents using Anthropic, Google, or other non-OpenAI-format endpoints get no coverage, and teams with a mixed provider setup gain only partial visibility. The docs describe no multi-user access controls or role separation, so the tool cannot be safely exposed across a development team without additional network-layer restrictions — teams beyond a single developer typically add a separate access layer or switch to a purpose-built observability platform. There is no alerting or notification system described in the repository; when a loop fires at 2 AM, the dashboard captures it, but nobody is paged — teams with production monitoring requirements move to a dedicated tracing platform such as LangSmith or Langfuse that integrates with existing alerting pipelines. With only 3 commits and 1 star at the time of curation, the project is early-stage; the community reports no track record of sustained maintenance, which is a real risk if you build a debugging workflow around it and a breaking API change in the upstream OpenAI spec goes unpatched.

Bottom line

ContextVault is paid while PromptShark is free; PromptShark is open source. Choose based on which difference matters most for your workflow.

Frequently asked questions

What is the difference between ContextVault and PromptShark?

ContextVault is Paid, while PromptShark is Free and open source. Compare pricing, free trial, API, platforms, and pros/cons in the table above on AIDiveForge.

Is ContextVault better than PromptShark?

It depends on your workflow. Use the side-by-side attributes (pricing, open source, API, self-hosted, platforms) to decide. AIDiveForge does not rank a universal winner — we publish verified facts so you can choose.