3/3
Open-source vector database from Amsterdam for search and RAG in your own AI app, also as a managed cloud.
- EU data
- Made in NL
PriceFree
Visit Weaviate
On the Weaviate 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.
Starting prices from €4.17 to €299 per month: a difference of up to €3,538 a year. Cheapest start: Postcode.nl Adres API, most expensive: Prepr. From 6 paid starting prices; check what each plan includes.
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
Quick pick
Follows from the facts below, not from what we earn.
- Cheapest paid planPostcode.nl Adres APILowest public starting price: €4.17/month excl. VAT.
- Best free optionAppSignalPreprWeaviateAppSignal, Prepr and Weaviate have the highest Netherlands check of the 10 tools with a free plan (3 of 3).
- Best with Dutch supportPostcode.nl Adres APIThe only tool with support in Dutch.
All 13 tools in this category
3/3
Monitoring for developers in one package, with error tracking, performance, logs, uptime and host metrics.
- EU data
- European
- Made in NL
From€18.25 /month excl. VATAlso a free plan30-day free trial
Visit AppSignal
On the AppSignal website
Ploi
Developer tools · for freelancers and SMEs
2/3
Server management for web developers, with installation, deployments, SSL and monitoring on your own VPS.
- European
- Made in NL
From€8 /monthAlso a free plan5-day free trial
Visit Ploi
On the Ploi website
3/3
Headless CMS from Utrecht for websites and apps, with A/B tests and personalisation, hosted in the Netherlands.
- EU data
- Made in NL
From€299 /month excl. VATAlso a free plan
Visit Prepr
On the Prepr website
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.
- European
PriceFree
Visit Zernio
On the Zernio website · partner link
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
Postcode.nl Adres API
Developer tools · for freelancers and SMEs and large companies
- Cheapest paid plan
- Best with Dutch support
3/3
API to autocomplete and validate addresses in your web shop or app, with BAG data and hosting in the Netherlands.
- Dutch support
- Dutch interface
- EU data
- +1 more
From€4.17 /month excl. VAT
Visit Postcode.nl Adres API
On the Postcode.nl Adres API 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
overheid.io
Developer tools · for freelancers and SMEs
1/3
REST APIs on Dutch open data, such as KvK company data, BAG addresses and vehicle registrations, with autocomplete.
- Dutch interface
- Made in NL
From€15 /month excl. VATAlso a free plan
Visit overheid.io
On the overheid.io website
Postcode API
Developer tools · for freelancers and SMEs
2/3
REST API that returns the street and town for a postcode and house number, with plug-ins for WooCommerce and Magento.
- Dutch interface
- Made in NL
From€6 /month excl. VAT
Visit Postcode API
On the Postcode API 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 |
|---|---|---|---|---|
| Weaviate | Yes | Yes | Yes | Free plan |
| AppSignal | Yes | Yes | Yes | Free plan, paid from €18.25/month |
| Ploi | Yes | Unknown | Yes | Free plan, paid from €8/month |
| Prepr | Yes | Yes | Yes | Free plan, paid from €299/month |
| 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 |
| Postcode.nl Adres API | Yes | Yes | Yes | from €4.17/month excl. VAT |
| Comp AI | No | Yes | No | On request |
| overheid.io | Unknown | Unknown | Yes | Free plan, paid from €15/month |
| Postcode API | Unknown | Yes | Yes | from €6/month excl. VAT |
✓ 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.
5 of 13 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.
11 of 13 tools
Company in the Netherlands
A Dutch company falls under Dutch law. For some businesses that matters, for example in a dispute.
7 of 13 tools
Popular comparisons
Where are they based?
According to the vendor's website or terms.
Netherlands 7
's-Hertogenbosch 1
Nijkerk 1
Nijmegen 1
Utrecht 1
Place unknown 1
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?
- Alternative to Ayrshare
- Alternative to GitHub
- Alternative to GitLab
- Alternative to Heroku
- Alternative to Netlify
- Alternative to Postman
- Alternative to SendGrid
- Alternative to Sentry
- Alternative to Twilio
- Alternative to Vercel
- Alternative to Weaviate
- Alternative to AppSignal
- Alternative to Ploi
- Alternative to Prepr
- Alternative to Zernio
- Alternative to Firecrawl
- Alternative to Knock
- Alternative to Context.dev
- Alternative to CodeRabbit
- Alternative to Postcode.nl Adres API
- Alternative to Comp AI
- Alternative to overheid.io
- Alternative to Postcode API
Frequently asked questions about developer tools software
Based on the facts as of 5 November 2026.
Which of the developer tools is the cheapest?
Of the developer tools we checked, Postcode.nl Adres API has the lowest starting price, at €4.17 per month. Tier 1, €50 per year excl. VAT (€4.17 per month), to spend on validations: €0.005 per Dutch postcode lookup, €0.03755 per validation through the Autocomplete or Validate API for countries including the Netherlands, Belgium and France. Higher tiers (€100 to €1,000 per year) give lower prices per validation; your subscription moves up a tier automatically if you use more. After registering you can test the APIs for free. Also check what the cheapest plan includes.
Which developer tools have a free plan?
AppSignal, CodeRabbit, Context.dev, Firecrawl, Knock, overheid.io, Ploi, Prepr, Weaviate and Zernio have a free plan. Do check what it includes; it is often limited.
Which developer tools offer support in Dutch?
Of the developer tools we checked: Postcode.nl Adres API.
Which developer tools store your data in the EU?
Of the developer tools we checked: AppSignal, Ploi, Postcode.nl Adres API, Prepr and Weaviate.
Which developer tools are there for freelancers?
AppSignal, CodeRabbit, Context.dev, Firecrawl, Knock, overheid.io, Ploi, Postcode API, Postcode.nl Adres API, Prepr, Weaviate and Zernio are aimed at freelancers.
We get a fee if you take out a subscription through us. That does not change our verdict.