What is the best API / SDK option in 2026?

Our editors currently rank Arcjet #1 among Development apps for API / SDK based on AppsInsight Score, features, pricing, and user feedback. See the full ranked list on this page for alternatives.

Are there free API / SDK tools?

Many Development apps for API / SDK include free plans or trials. Use the pricing filter on this page to browse free and freemium options.

How do we rank API / SDK?

We evaluate Development apps for API / SDK on features, ease of use, value for money, integrations, and real user feedback. Apps are ranked by AppsInsight Score within this guide, with editorial adjustments when hands-on testing reveals a clear winner for this use case or audience.

Top Development Software for API / SDK

10 Top Development Software for API / SDK

Independently reviewed

Updated October 7, 2026

Whether you're a startup or enterprise, these Development apps for API / SDK help teams work faster. Compare ratings, pricing, features and integrations below to find the best fit for 2026.

Use filters and side-by-side details to shortlist the strongest options.

Feature	Arcjet	Directus	Floot	ElevenLabs	Mintlify	Hopscotch AI	Mastra
Editor rating	4.3	4.2	4.0	4.6	4.4	4.1	4.0
Pricing	Free+Paid	Free+Paid	Free+Paid	Free+Paid	Free+Paid	Usage-based	Free+Paid
Starting price	$25	$0	$0	$0	$0	—	$0
Free plan	Included	Included	Included	Included	Included	Included	Included
Platforms	API / SDK, CLI / Terminal	Web app, Self-hosted / On-premise, API / SDK, CLI / Terminal	Web app, iOS (iPhone & iPad), Android, API / SDK	Web app, iOS (iPhone & iPad), Android, API / SDK	Web app, API / SDK, CLI / Terminal	Web app, API / SDK	Web app, API / SDK, CLI / Terminal

#10

ElevenLabs

4.6
AI voice platform for text to speech, voice cloning, dubbing, music and conversational voice agents, with APIs and SDKs for developers. ElevenLabs is an AI audio company best known for lifelike text to speech.
Pricing
Free planPaid from $0
Best for
Creators video and podcast producers developers building voice features
Platforms
Web app iOS (iPhone & iPad) Android API / SDK
Updated October 6, 2026
Full review ElevenLabs vs Claude Sonnet 5.5

44
AppsInsight Score Needs work
Read review Visit site
#11

Mintlify

4.4
Documentation platform for developers and AI agents, with a web editor, an AI assistant, MCP server and self-updating docs. Mintlify is a documentation platform used mainly for developer and API docs.
Pricing
Free planPaid from $0
Best for
Developer-tool and API companies startups that want polished docs with little setup and teams that want their documentation readable by AI agents.
Platforms
Web app API / SDK CLI / Terminal
Updated October 6, 2026
Full review Mintlify vs Ferndesk

44
AppsInsight Score Needs work
Read review Visit site
#12

Arcjet

4.3
Runtime security for AI agents, coding agents and web apps Arcjet is a security platform for code that makes decisions on its own.
Pricing
Free planPaid from $2515-day trial
Best for
Developer teams shipping AI agents or AI-powered features who need guardrails against prompt injection data leaks and runaway token spend and who are happy to integrate an SDK.
Platforms
API / SDK CLI / Terminal
Updated October 6, 2026
Full review Arcjet vs iFixAi

50
AppsInsight Score Average
Read review Visit site
#1

Directus

4.2
Open-source backend and headless CMS that turns any SQL database into instant REST and GraphQL APIs, with a no-code studio and a native MCP server. Directus is a backend platform that sits on top of a SQL database you already…
Pricing
Free planPaid from $0
Best for
Developers and agencies building headless sites and apps product teams that need a no-code admin on top of a SQL database and teams that want governed AI or MCP access to business data.
Platforms
Web app Self-hosted / On-premise API / SDK CLI / Terminal
Updated October 6, 2026
Full review Directus vs ElevenLabs

47
AppsInsight Score Needs work
Read review Visit site
#2

Hopscotch AI

4.1
One API for 500+ AI models, with spend limits and failover built in. Hopscotch AI: one API, every model, no markup Hopscotch is an LLM gateway: a single OpenAI-compatible API that fronts more than 500 models from Anthropic, OpenAI, Google,…
Pricing
Usage-based
Best for
Developers and teams running multi-model AI workloads who want one API one bill and hard spend limits instead of juggling provider accounts.
Platforms
Web app API / SDK
Updated October 1, 2026
Full review Hopscotch AI vs ElevenLabs

42
AppsInsight Score Needs work
Read review Visit site
#14

Mastra

4.0
Open source TypeScript framework for building, observing and improving AI agents Mastra is a TypeScript framework for building AI agents, plus a hosted platform to run and watch them.
Pricing
Free planPaid from $0
Best for
TypeScript and Node developers building production AI agents who want observability and evals alongside the code.
Platforms
Web app API / SDK CLI / Terminal
Updated October 6, 2026
Full review Mastra vs Grain

40
AppsInsight Score Needs work
Read review Visit site
#13

ZooWork

4.0
AI agent delivery platform where experts package their know-how as Agent Skills and ship always-on agents with managed runtime. ZooWork is a platform for building, deploying and running AI agents, aimed at forward-deployed engineers and domain experts.
Pricing
Paid Subscription$30
Best for
Consultants forward-deployed engineers and operations teams who want to turn expert playbooks into deployed agents inside Slack or other chat tools.
Platforms
Web app iOS (iPhone & iPad) API / SDK
Updated October 6, 2026
Full review ZooWork vs Grain

39
AppsInsight Score Needs work
Read review Visit site
#15

Floot

4.0
Build and publish real apps from Claude, ChatGPT or Cursor, with backend and hosting included Floot is an AI app builder that works from inside the assistant you already use.
Pricing
Free planPaid from $0
Best for
Founders operators and non-coders who want to describe an app in chat and get a live web and mobile product with the backend handled for them.
Platforms
Web app iOS (iPhone & iPad) Android API / SDK
Updated October 7, 2026
Full review Floot vs ElevenLabs

46
AppsInsight Score Needs work
Read review Visit site
#5

heade.rs

3.6
Free domain, IP and ASN reports for hosting, DNS, network routes and public website diagnostics. heade.rs review: a clear first look at a website’s public infrastructure Editorial draft in Ashley Richmond’s voice.
Pricing
Free plan
Best for
Developers investigating public website infrastructure Site operators checking DNS and mail-policy clues Network investigators using non-sensitive targets
Platforms
Web app API / SDK CLI / Terminal
Updated October 2, 2026
Full review heade.rs vs Mastra

39
AppsInsight Score Needs work
Read review Visit site
#20

CrawlRaven

3.5
Turn Search Console, GA4 and keyword research into a ranked SEO action plan What is CrawlRaven?
Pricing
Free planPaid from $39 one-time (paid); $0 free plan
Best for
SEO agencies managing several websites In-house content teams with Search Console data Founders prioritizing content refreshes
Platforms
Web app API / SDK
Updated October 7, 2026
Full review CrawlRaven vs Ahrefs

38
AppsInsight Score Needs work
Read review Visit site

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