Nylas
Email and calendar APIAPI for email, calendar, and meeting integrations.

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.
API for email, calendar, and meeting integrations.
3D conversion software for CAD and animation workflows.
Run and build with open AI models locally or in the cloud.
API for publishing, scheduling, inbox, and analytics on social platforms.
Managed Apache Solr hosting and AI site search.
AI-powered SaaS products for specific professions.
Print management software for organizations and businesses.
Protection for WordPress and JavaScript vulnerabilities
PDF creation, editing, and SDK tools.
Proofreading software for professional document editing.
Developer components for uploads, PDFs, images, and related tasks.
Search engineering documents and find proven precedents fast.
Schedule social posts from one calendar or API.
Platform for process, product, and workforce analytics.
Low-latency time-series database
AI-assisted PCB design tool for hardware teams.
AI agents and multichain blockchain infrastructure.
Build software for regulated medical devices.
Astrology APIs for spiritual wellness apps and developers.
Server log intelligence for search and AI crawlers.
Software platform for secure government deployment.
AI defense software for autonomous operations.
Ontology and explainable AI software for complex projects.
Industrial SCADA and HMI software for monitoring and control.
Software that connects company data to AI assistants.
Tools for profiling, protection, and virtualization.
Software for direct selling and network marketing companies.
AI-driven hardware and software for IoT and logistics.
Publishes API docs, MCP servers, and llms.txt from OpenAPI specs.
Batch speech-to-text API with speaker diarization.
Cloud render farm for CPU and GPU rendering.
Aviation maintenance software for MRO operations.
Website and uptime monitoring for alerts.
Headless CMS for developers and clients.
Document SDKs for apps and AI agents.
Secure automation for AI agents, apps, and workflows.
Open source SOAR for security teams and AI agents.
AI agent security platform for enterprises.
Transcript API for social video.
Upload and process files through one API.
Email API with a visual template builder for product teams.
Video capture, editing, and playback SDKs.
Enterprise Drupal and web platform services with source code ownership.
Ecommerce platform for creating and selling online stores.
Secure EDI automation and document exchange for trading partners.
Run enterprise AI with modular products and services.
Feature management for rollouts, targeting, and audit trails.
Optimizes Kubernetes and block storage costs automatically.