Butter
Agent sandboxesLocal sandbox runtime for AI agents.

Sealbook lists 4,084 Developer Tools & APIs products. Common specialties: AI app builder, Web scraping API, PDF generation API, Screenshot API, Cloud infrastructure. Most vendors are based in United States (914), United Kingdom (86), Germany (74), Canada (42). 3,539 have a feature-by-feature check from their own website and 1,737 publish plan prices. Ranked by how widely known each product is and how much we could confirm — vendors cannot pay for position.
Local sandbox runtime for AI agents.
AI coding agent for C and C++.
Software for provably correct code.
Search for product and file discovery.
API and platform for sourcing target personas.
Build and optimize websites that answer visitors and adapt to changes.
Benchmark and leaderboard for computer-use AI agents.
Run coding agents on Macs and Linux servers.
Visualize code architecture and changes for software teams.
Visibility and controls for AI agents on endpoints.
Open source integration layer for AI agents.
Platform for GPUs, models, and agents.
Computer use agent for Windows.
Routing layer for AI agents.
Voice AI for field technicians.
AI workspace for software implementations.
Approve AI agent actions with company policies.
Operating system for agentic work.
Continuous inference infrastructure for real-time AI.
Turn videos into structured data.
Managed cloud agents for software teams
API and tools for richer embeds in sites and apps
Open source AI gateway for routing model traffic.
AI software engineer that writes, tests, and opens pull requests.
Finds and fixes code vulnerabilities with AI.
Git hosting, code review, and stacked pull requests.
Turn team know-how into playbooks and agents.
AI tools for chip design teams.
Testing environments for coding agents.
Cloud agents for building and testing software.
Medical record retrieval across payers and EHRs.
Repeatable tests for AI agents.
On-demand human experts for AI agents.
Create 3D assets in your browser with AI.
AI SRE that investigates incidents for teams.
Operating system for laboratory workflows.
Run open models with low cost and latency.
Unified API, UI, and AI test automation for teams.
Turn documents and prompts into explainer videos.
Checks drawings, documents, and revisions for engineering teams.
Workspace for managing coding agents and their work.
Procedural memory for AI agents.
Guardrails for AI access to Postgres databases.
Dynamic context for AI agents without redeploying.
Shared drive for AI coding sessions
Compute for training, inference, and agents
Launch secure apps and environments on your cloud
Turns products into CLIs for agent use.