
Mem0
Memori
Agentmemory
Supermemory
Tempreon
cognee
TheSecondBrain.dev
Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client
Langfuse
PromptPerfect
Helicone AI
LangSmith
AI Prompt Generator
PromptHub
AI Prompt Finder
The first platform built for prompt engineers

Which is more popular?
Based on our record, PromptLayer seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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PromptLayer
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| Website | chainmemory.ai | promptlayer.com |
| Pricing | — | |
| Listed in |
In their own words, as submitted to SaaSHub.

ChainMemory gives your AI agents persistent memory that belongs to YOU — not to a single vendor. Save a memory in ChatGPT, recall it in Claude or Gemini. Available via Chrome extension, MCP server (npm), or REST API. Every memory gets a cryptographic fingerprint and project states are anchored...
No description of PromptLayer yet.
What each product offers, as listed by its team.

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An editorial look at what each product does well and who it suits.

Overall verdict
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Prompt Engineering for Beginners - Tutorial 6 - PromptLayer
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Developer-focused with Git-style version control. Integrates with APIs, supports team collaboration, logs AI requests, and tracks how different prompt versions perform against production code. For anyone building...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ChainMemory since Jul 2026.
Looks nice, and it's nice that it also supports function call simulation. I've been collecting a list of tools for prompt engineering, I've added Knit now. Newly added: https://promptknit.com/ Newly added:... - Source: Hacker News / about 3 years ago
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Persistent memory from agent trace, not just conversation
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AI Prompt Engineering Tool and Prompt Optimizer
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Persistent memory for Claude Code, Codex & coding agents
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Open-source LLM Observability for Developers
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