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PromptLayer
✓ verifiedFree
Prompt engineering, management, and LLM observability platform.
212K visits/mo
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ChatPDF
✓ verifiedFreemium
Popular tool to chat with PDFs and other documents, giving summaries and cited answers, with a free daily tier and no-signup start.
1.8M visits/mo43K saves
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Chunky
✓ verifiedFreemium
No-code AI chatbot builder that trains on your website or PDFs to automate support FAQs, with a free-forever tier.
913 visits/mo
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Llongterm
✓ verifiedFreemium
Long-term memory API that gives AI chatbots and agents persistent, human-readable memory of users.
Pricing
No public pricing
No public pricing
No public pricing
No public pricing
No public pricing
Core features
- ✦Prompt management
- ✦Prompt evaluations
- ✦LLM observability
- ✦Team collaboration
- ✦Version control for prompts
- ✦A/B testing of prompts
- ✦Prompt Registry
- ✦Historical backtests
- ✦Regression tests
- ✦Usage monitoring
- ✦Lifelike voice AI agents
- ✦24/7 availability
- ✦Customer-led conversational platform
- ✦Integration with enterprise systems
- ✦Chat with PDFs, Word, PowerPoint and text files
- ✦Summaries with cited sources
- ✦Multi-file chats via folders
- ✦Any-language upload and chat
- ✦Extra tools: AI writer, detector, flashcards, slides
- ✦No-signup quick start
- ✦No-code chatbot creation
- ✦Train on PDFs, website URLs, or Google Sheets
- ✦One-line website embed or shareable link
- ✦Customizable bot appearance
- ✦~95 language support
- ✦Free-forever plan
- ✦Persistent long-term memory for AI agents
- ✦Human-readable structured memory
- ✦JavaScript SDK (Python coming soon)
- ✦Compatible with any chatbot or agent
- ✦Interactive sandbox
Use cases
- →Scaling customer support automation with LLMs
- →Empowering non-technical teams with prompt engineering
- →Building personalized AI interactions
- →Debugging LLM agents
- →Improving content creation processes
- →Managing and monitoring prompts with a team
- →Answering customer service calls
- →Providing information and support
- →Resolving customer issues
- →Automating call center operations
- →Understand research papers
- →Study and homework help
- →Review contracts and reports
- →Translate and summarize documents
- →Automating customer-support FAQs
- →Adding a website chat widget
- →Answering visitor questions from your own content
- →Give an AI assistant lasting user memory
- →Build tutoring or support bots that recall context
- →Maintain evolving user profiles across sessions
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