Zernio
Developer tools · for freelancers and SMEs and large companies
1/3
One API to post, schedule and analyse on Instagram, TikTok, LinkedIn, YouTube and other social channels.
PriceFree
Visit Zernio
On the Zernio website
Developer tools and APIs for people who build their own software
APIs and tools for people who build their own software or AI agents: scraping, notifications, code review, social posting and compliance. Above all, check where your users' data ends up.
Sorted by overall score. A place in the list is not for sale, and we sometimes earn a little from a click: that does not change the order. How the score is weighted · How we make money
All 6 tools in this category
Firecrawl
Developer tools · for freelancers and SMEs and large companies
1/3
Open-source API that scrapes, crawls and searches websites and gives your AI agent the content as Markdown or JSON.
PriceFree
Visit Firecrawl
On the Firecrawl website · partner link
Knock
Developer tools · for freelancers and SMEs and large companies
1/3
Notification infrastructure to send email, SMS, push, Slack and in-app messages from your own app through one API.
PriceFree
Visit Knock
On the Knock website
Context.dev
Developer tools · for freelancers and SMEs and large companies
1/3
Web API for AI agents that scrapes, crawls, searches and fetches brand and company data through one API.
PriceFree
Visit Context.dev
On the Context.dev website · partner link
CodeRabbit
Developer tools · for freelancers and SMEs and large companies
1/3
AI code review that checks every pull request in GitHub or GitLab, free for public repositories.
PriceFree14-day free trial
Visit CodeRabbit
On the CodeRabbit website
Comp AI
Developer tools · for SMEs and large companies
1/3
Open-source compliance platform that collects evidence and writes policies for SOC 2, ISO 27001 and GDPR.
PriceOn request
Visit Comp AI
On the Comp AI website
All tools at a glance
Click a tool for the details and the source.
| Tool | Data in EU | Data processing agreement | Dutch company | Price |
|---|---|---|---|---|
| Zernio | No | Yes | No | Free plan |
| Firecrawl | No | Yes | No | Free plan |
| Knock | No | Yes | No | Free plan |
| Context.dev | No | Yes | No | Free plan |
| CodeRabbit | No | Yes | No | Free plan |
| Comp AI | No | Yes | No | On request |
✓ yes · ✕ no · ? cannot be verified
Netherlands check for developer tools
Useful if you run a business in the Netherlands: what each point means and how many tools meet it.
Data in the EU
An API you build into your product often processes your customers' data. If that data is outside the EU, you have to explain that in your own privacy statement and data processing agreement.
0 of 6 tools
Data processing agreement
If you build an API into your product, the vendor becomes a sub-processor for your customers. Without a data processing agreement you cannot cover that chain.
6 of 6 tools
Company in the Netherlands
A Dutch company falls under Dutch law. For some businesses that matters, for example in a dispute.
0 of 6 tools
Popular comparisons
Where are they based?
According to the vendor's website or terms.
Headquarters outside the Benelux 6
United States US5
- CodeRabbitCodeRabbit, Inc.; terms under Californian law
- Comp AI · AventuraBubba AI, Inc. (trading as Comp AI), headquarters near Miami and an office in New York
- Context.dev · WilmingtonContext Dev Inc., formerly Brand.dev
- FirecrawlSideGuide Technologies, Inc. (trading as Firecrawl), a Delaware company
- Knock · New YorkKnock Labs, Inc.
Spain ES1
Looking for an alternative?
Frequently asked questions about developer tools software
Based on the facts as of 4 November 2026.
Which developer tools have a free plan?
CodeRabbit, Context.dev, Firecrawl, Knock and Zernio have a free plan. Do check what it includes; it is often limited.
Which developer tools are there for freelancers?
CodeRabbit, Context.dev, Firecrawl, Knock and Zernio are aimed at freelancers.
We get a fee if you take out a subscription through us. That does not change our verdict.