SourceStack

B2B data, pay for what you pull

APICapable readiness

About

What is SourceStack

SourceStack scrapes and aggregates public data sources, then cleans and categorizes the output into structured datasets covering companies, job postings, SKUs, products, and technology stacks. It's built for RevOps teams, GTM engineers, and SDR/BDR orgs at growth-stage and mid-market companies that need raw data access without paying for a full contact database they'll only partially use. The standout capability is direct ATS jobs data — pulling live hiring signals straight from applicant tracking systems, which gives recruiting-tech builders and sales teams a signal layer most enrichment tools don't expose. Filtering spans 200+ targeting attributes and 900+ segmentation categories, so list-building can get granular. The honest limitation: there are no native CRM integrations mentioned, so you'll need to handle data delivery and routing yourself, which adds engineering lift for teams without a dedicated GTM engineer.

Data & Discovery

Capabilities

Key features

Prospecting database

searchable B2B contact + company directory

Our verdict

Vanderbuild take

SourceStack sits squarely in the prospecting database and data enrichment layer — it's a raw data API for GTM engineers and RevOps teams who want to build their own workflows rather than buy a packaged tool. The REST API is live and documented, so you can wrap it into your own MCP layer or agent pipeline without much friction — solid agentic readiness for teams willing to do the plumbing. Pricing is usage-based with credit packages starting at 100k records, which is accessible for SMBs and growth-stage teams, though custom pricing means you'll need a sales conversation before you know your actual number. The real limitation is the absence of native CRM integrations — there's no push-to-HubSpot or Salesforce out of the box, so every downstream workflow requires your own data pipeline work.

Mateusz Sekta

Founder, vanderbuild

The wedge

Agentic stack profile

API

REST

Programmatic access available.

REST API — straightforward to call from any agent or workflow tool. Rate limits and auth vary by plan.

API docs →

Agentic readiness

Capable

Solid API access — wraps cleanly for agent use.

Solid REST or SDK access. No MCP server yet, but easy to wrap in custom agent tooling. Most modern SaaS tools land here.

Stack role

Data source · Enricher

Where this tool slots into an agentic pipeline.

Plays the role of Data source + Enricher in an agentic pipeline. Use it to source contacts, companies, and the raw inputs an agent needs to act; add firmographic, technographic, and signal data to a lead row on the fly.

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