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PromptLayer
✓ verifiedFree
Prompt engineering, management, and LLM observability platform.
212K visits/mo
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Runware
✓ verifiedFreemium
Pay-as-you-go API aggregating thousands of image, video, audio and LLM models with custom inference hardware for lower per-request cost.
249K visits/mo
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Meilisearch
✓ verifiedFreemium
Fast, developer-friendly open-source search engine and AI retrieval platform offering full-text, semantic, and hybrid search.
198K visits/mo
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Inbox Zero
✓ verifiedFree trial
Open-source AI email assistant that auto-labels mail, drafts replies in your voice and helps clear your inbox from web or Slack.
68K visits/mo1.6K saves
Pricing
No public pricing
Pay-as-you-go: 42.8% platform fee for corporate, 33.3% for academic/non-profit (no monthly fee)
Participant payment: minimum $8.00/hr, recommended $12.00/hr
vCPU compute: $0.016/hr
RTX PRO 6000: $1.99/hr (as low as $0.99)
H100: $2.76/hr
H200: $3.18/hr
B200: $4.99/hr
Free trial available
Cloud: $20/mo (starting, usage/resource-based, 14-day free trial)
Free trial available
Starter: $18/user/mo
Plus: $28/user/mo
Professional: $42/user/mo
Free trial available
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
- ✦Access to a verified and engaged participant pool
- ✦Self-serve platform for easy task setup and launch
- ✦Tools for AI training and evaluation
- ✦Fair compensation for participants
- ✦Audience checker
- ✦Single API for image, video, audio, 3D and LLM models
- ✦Standardized model addressing across hosted, partner and custom uploads
- ✦Support for LoRAs, ControlNets, VAEs and embeddings on open-source models
- ✦WebSocket and REST access with async webhook delivery
- ✦Pay-per-request billing with no infrastructure to manage
- ✦Raw serverless GPU/CPU compute for custom workloads
- ✦Sub-50ms search-as-you-type
- ✦Full-text, semantic, and hybrid search
- ✦Vector storage for RAG and similarity queries
- ✦Multimodal and federated search
- ✦Filtering, faceting, sorting, and geosearch
- ✦Managed cloud or self-hosted open source
- ✦Automatic email labeling and categorization
- ✦Pre-drafted replies in your voice
- ✦Bulk unsubscribe and archive
- ✦Auto-files attachments to Drive/OneDrive
- ✦Works from web, Slack and Telegram
- ✦Open-source and self-hostable, SOC 2 Type 2
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
- →Academic research
- →AI training and evaluation
- →Market research
- →User research & testing
- →Data annotation
- →Training & alignment
- →Evaluation & safety
- →Adding AI image or video generation to an app without managing infra
- →Batching multi-modal generation tasks in one API call
- →Running custom fine-tuned models via Model Upload
- →Cutting inference costs at high generation volume
- →Adding fast site or app search
- →Building AI/RAG retrieval pipelines
- →E-commerce and media search experiences
- →Semantic search over private data
- →Reaching inbox zero quickly
- →Drafting replies faster
- →Cleaning up subscriptions
- →Managing email without switching apps
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