DataSend.ai vs Firmenbuch and WKO Firmen A-Z: How to Find and Reach Companies in Austria

Introduction: Austria has two main sources of company data. Neither is a client acquisition tool.

If you are looking for companies in Austria, you have two main public sources available. Firmenbuch — the official court database with legal and registration data. And WKO Firmen A-Z — a directory of the Chamber of Commerce with over 621,000 members.

Both are useful for verifying a company or finding basic information. But if you want to systematically reach out to and acquire Austrian companies, you need something else.

1. Firmenbuch: Official Court Database

Firmenbuch is a publicly accessible database of the Federal Ministry of Justice. It contains registration data for all companies registered in the commercial register.

What you will find:

Company name, legal form (GmbH, AG, e.U., KG...). Firmenbuch number, registered office and address. Names of directors, authorized signatories, and board members. Share capital. Founding documents and changes.

What you will not find:

Email addresses. Phone numbers. Websites. Industry. Turnover or number of employees. No way to filter by size, region, or industry. No outreach tools.

Access is through JustizOnline (justizonline.gv.at). Searches can be made by company name, Firmenbuch number, or person’s name. Bulk exports are not available.

2. WKO Firmen A-Z: Chamber of Commerce Directory

WKO Firmen A-Z (firmen.wko.at) is the largest online directory of Austrian companies — 621,000+ businesses that are automatically listed based on membership in the Chamber of Commerce.

What you will find:

Company name and address. Industry and trade licenses. Some companies have filled in contact details — email, phone, website. Basic filtering by industry and region.

What WKO Firmen A-Z does not offer:

Verified contact details — companies fill them in themselves, and many do not. No financial data (turnover, employees). No email campaigns or outreach tools. No API for integration. No CRM or pipeline.

WKO Firmen A-Z is a directory, not a sales tool. It is useful for basic searches, but insufficient for systematic outreach to companies.

3. DataSend.ai: 1.28 million Austrian companies with contacts and a complete outreach tool

DataSend.ai covers the Austrian market with 1.28 million companies, of which 661,000 have at least one verified contact detail.

What you will find for Austrian companies:

Verified email addresses with deliverability checks. Phone numbers with distinction between mobile/fixed line. Websites with Web Intelligence scores (website quality, SSL, mobile optimization, e-shop detection). Industry (40+ categories). Region (all 9 federal states). Registration data (Firmenbuch number, tax number, VAT ID number).

What you can do directly on the platform:

Filter by federal state, industry, company size, and over 20+ other criteria. Launch email campaigns with AI personalization in German — AI Grammar Variables automatically generate correct grammatical forms: “in Wien" (not “in die Wien"), “im Gesundheitswesen" (not “in Gesundheitswesen"), “für Ihr Unternehmen" (not “für Ihre Unternehmen"). Follow-up sequences run automatically. Track responses in Unibox with AI classification. Move leads into the Pipeline and track deals.

4. Direct Comparison

Number of companies: Firmenbuch — all registered companies (exact number depends on the type of registration). WKO Firmen A-Z — 621,000+ members. DataSend.ai — 1.28 million companies, 661,000 with verified contacts.

Contact details: Firmenbuch — no emails, phones, or websites. WKO Firmen A-Z — partial (companies fill them in themselves, many are missing). DataSend.ai — verified emails, phones, and websites.

Filtering: Firmenbuch — by company name or Firmenbuch number. WKO Firmen A-Z — by industry and region (basic). DataSend.ai — 20+ filters: industry, region (9 federal states), size, web score, type of company.

Email campaigns: Firmenbuch/WKO — none. DataSend.ai — complete email infrastructure with AI personalization and warmup.

AI personalization in German: Firmenbuch/WKO — does not address. DataSend.ai — correct declension and grammatical forms for Austrian German automatically.

CRM / Pipeline: Firmenbuch/WKO — none. DataSend.ai — built-in pipeline with notes and stages.

Coverage: Firmenbuch/WKO — only Austria. DataSend.ai — 7 Central European countries (9M+ companies total). If you operate in Germany or Switzerland as well, you do not need another tool.

Price: Firmenbuch — free search, extracts for a fee (approx. €11/extract). WKO Firmen A-Z — free. DataSend.ai — from $0 (free plan), paid from $89/month.

5. When to Use Firmenbuch or WKO

Firmenbuch is the right choice when:

You need verified registration data for a contract or invoice. You are verifying directors, share capital, or legal form. You need an official extract from the commercial register.

WKO Firmen A-Z is the right choice when:

You are looking for companies by industry and trade license. You need basic contact information for a specific company.

6. When to Use DataSend.ai

DataSend.ai is the right choice when:

You want to find Austrian companies by industry, federal state, and size. You need verified contact details for systematic outreach. You want to send personalized emails in correct German. You want the entire process in one place — from database to pipeline. You operate in the DACH region and need data from Austria, Germany, and Switzerland on one platform.

7. DACH Region: One Platform for Three Markets

If you operate in the DACH region (Germany, Austria, Switzerland), DataSend.ai is the only platform where you can find companies from all three countries in one place. 3.1 million German companies, 1.28 million Austrian, and 1.03 million Swiss companies — over 5.4 million companies in total with one login, one filter, and one campaign.

No switching between registers, no different data formats, no 3 different subscriptions.

Conclusion

Firmenbuch verifies companies. WKO Firmen A-Z categorizes them in a directory. DataSend.ai helps you find, reach out to, and acquire them as clients.

Want to reach Austrian companies? DataSend.ai — 1.28 million companies, 661,000 verified contacts, AI personalization in German. Everything in one place.

Try it for free →