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9 Best APIs & Backend Tools in 2026

Compare APIs & Backend Tools by their features, costs, and limitations. Read the reviews to decide which fits your work.

Best APIs & Backend Tools

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Anthropic Claude API preview
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Anthropic Claude API

Enterprise AI API with safety and reliability

Pricing: Confirm current plans with the product’s official site.

Official site: Anthropic Claude API ↗

Insomnia preview
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Insomnia

API client and design platform

Pricing: Confirm current plans with the product’s official site.

Official site: Insomnia ↗

Knock preview
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Knock

Customer engagement infrastructure

Pricing: Confirm current plans with the product’s official site.

Official site: Knock ↗

OpenAI API preview
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OpenAI API

Access GPT-4 and other models via API

Pricing: Confirm current plans with the product’s official site.

Official site: OpenAI API ↗

Postman preview
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Postman

API development and testing platform

Pricing: Confirm current plans with the product’s official site.

Official site: Postman ↗

Replicate preview
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Replicate

Run AI models with a simple API

Pricing: Confirm current plans with the product’s official site.

Official site: Replicate ↗

Scribiz preview
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Scribiz

Best for transcribing both speech and on-screen text from online videos.

Watch for: Pro plan's 600-minute limit is low compared to competitors.

Pricing: A generous free tier offers 10 minutes of AI transcription daily. The $10/month Pro plan provides 600 minutes, best for regular but not heavy users.

Official site: Scribiz ↗

More about Scribiz

Scribiz is a smart tool that transcribes both audio and on-screen text from videos. It's perfect for researchers and students analyzing lectures or tutorials. The main caveat is its minute-based pricing, which is less competitive for users needing to transcribe high volumes of content compared to 'unlimited' services.

Check before choosing

  • Minute-based pricing is complex to calculate.
  • Does not specify the number of languages supported.
Read the Scribiz review →
Supabase preview
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Supabase

Open-source Firebase alternative with PostgreSQL

Pricing: Confirm current plans with the product’s official site.

Official site: Supabase ↗

tRPC preview
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tRPC

End-to-end typesafe APIs with TypeScript

Pricing: Confirm current plans with the product’s official site.

Official site: tRPC ↗

How to choose

Start with the task you need to finish. Compare the relevant features, plan limits, and setup effort in each review.

Listed alphabetically. Use the reviews to find your best fit. These are research-based reviews, not hands-on test scores.

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Best AI Tools

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ChatGPT preview
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ChatGPT

Best for general-purpose AI tasks, but its crowded pricing tiers can be confusing.

Watch for: Confusing and crowded pricing with six different plans.

Best AI Productivity Tools

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Motion App preview
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Motion App

Best for busy professionals who need AI to automatically schedule their tasks, but it's expensive for solo users.

Watch for: Solo plan is expensive at $29/month (annual) or $49 (monthly).

Best AI & Machine Learning Tools

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AI SEO Tracker preview
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AI SEO Tracker

Get your brand discovered by ChatGPT, Gemini, and Claude.