Aviationstack ◆
Aviationstack is a scalable REST API for real-time flight tracking, historical flight data, airport info, and global aviation data.

Caisy.io (Developer Tools): Caisy.io is a headless CMS with real-time collaboration, GraphQL API, and flexible plans starting at $49/mo. Pricing: from $49/mo. (data verified August 2026)
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Caisy.io is a headless content management system (CMS) designed to streamline content creation and publishing across multiple channels. It combines an intuitive, visual editor with a developer-friendly GraphQL API, enabling teams to manage content efficiently while maintaining full flexibility in how and where content is delivered.
Traditional CMS platforms often lack scalability or force developers to rely on rigid templates. Caisy.io solves this by offering a component-based, API-first architecture that decouples content from presentation. Marketers and editors can build pages with reusable components without needing developer help, while developers get a fully typed SDK and GraphQL API for seamless integration into web, mobile, or other applications.
Caisy.io is ideal for agencies managing multiple client projects, developers seeking a modern, flexible CMS, editors wanting a clean and intuitive interface, and marketers aiming for omnichannel content distribution. It's not intended for small static websites that don't require headless architecture or multichannel publishing.
Use Caisy.io to manage content for a corporate website with a mobile app, launch a multi-language e-commerce store with localized content, or create a component-driven blog that reuses content across different platforms. Its real-time collaboration features make it perfect for team editing and reducing version conflicts.
Editorial score from our review methodology — not user ratings.
Caisy.io pricing: from $49/mo.
Always free for individuals building personal projects or exploring Caisy.io. Includes 3 users, 2 locales, 5,000 entries, 100GB traffic, 30 blueprints, and 1 million API calls per month. No overages.
$49 per month (try 30 days for $0). For small businesses needing cost-effective content management. Includes 12 users, 4 locales, 20,000 entries, 500GB traffic, 60 blueprints, and 10 million API calls. Overages: extra user $10/mo, extra 10k entries $20/mo, extra locale $15/mo, extra 1TB bandwidth $60/mo, extra 10 blueprints $10/mo.
From $1499 per month. For businesses scaling with dedicated support and governance. Everything in Growth plus custom quotas, custom user roles, audit logs, content workflows, custom SSO, SLA 99.9% uptime, dedicated account manager, on-premise hosting, custom domain, and flexible overages.
Free trial available: 30-day trial of Growth plan at $0. No credit card required for free plan.