Coresignal
Public web data, structured for work.
What is Coresignal
Coresignal collects and structures public web data — company firmographics, employee records, and job postings — and delivers it through APIs or flat files in JSON, JSONL, CSV, and Parquet formats. It's built for RevOps teams, GTM engineers, and marketing orgs at mid-market and enterprise companies that need reliable data pipelines rather than point-and-click prospecting tools. The standout capability is up to five years of historical data, which lets teams track headcount trends, funding activity, and hiring signals over time rather than just seeing a current snapshot. Data can be routed directly to Google Cloud, Azure, AWS S3, or Databricks, making it a fit for teams that already have a data infrastructure in place. That said, Coresignal is a data supplier, not an engagement platform — there's no built-in sequencing, CRM sync, or contact verification layer, so teams will need to wire it into their own stack to act on what they pull.
Key features
fills records with firmographic, technographic, or signal data
intent signals, real-time enrichment, firmographic + tech-stack data
event-driven integrations
Vanderbuild take
Coresignal sits squarely in the data infrastructure layer of a GTM or RevOps stack — it's not a prospecting UI, it's a data feed that serious teams pipe into their own systems. The MCP server support makes it natively agent-callable, which means if you're building agentic outbound or AI-driven scoring workflows, Coresignal can function as a live enrichment layer without any custom wrapping. Budget tier 3 is accurate here — the Starter plan at $49/month is fine for testing, but any real production workload lands you at $800–$1,500/month, so plan accordingly and make sure someone on your team can manage the data pipeline. The honest limitation is that Coresignal has no native CRM integrations or contact engagement features, so it only delivers value if your team has the engineering capacity to operationalize the data it provides.
Agentic stack profile
MCP serverYesLive MCP server — agents can call this tool directly.
Exposes the Multi-source Company API, Multi-source Employee API, and Base Jobs API to LLM-powered applications. It allows AI assistants like Claude and Cursor to query B2B data directly using an API key for authentication.
Open MCP →APIRESTProgrammatic access available.
REST API — straightforward to call from any agent or workflow tool. Rate limits and auth vary by plan.
API docs →Agentic readinessNativeBuilt for agents from the ground up.
MCP server + agent-friendly API + at least one autonomous workflow out of the box. The bar for 'Native' is high — only a handful of tools currently qualify.
Stack roleEnricher · Data sourceWhere this tool slots into an agentic pipeline.
Plays the role of Enricher + Data source in an agentic pipeline. Use it to add firmographic, technographic, and signal data to a lead row on the fly; source contacts, companies, and the raw inputs an agent needs to act.
Coresignal alternatives
Tools that solve a similar problem — compared at a glance.
- Pricing
- Usage-based
- Budget
- $$$
- Best for
- RevOps, GTM Engineer
- Readiness
- Native
- MCP
- Yes
- API
- REST
- Pricing
- Freemium
- Budget
- $$$
- Best for
- RevOps, GTM Engineer
- Readiness
- Native
- MCP
- Yes
- API
- REST
- Pricing
- Usage-based
- Budget
- $$$
- Best for
- GTM Engineer, RevOps
- Readiness
- Native
- MCP
- Yes
- API
- REST
Frequently asked questions
Does Coresignal have an MCP server?
Yes — Coresignal exposes a Model Context Protocol server. Exposes the Multi-source Company API, Multi-source Employee API, and Base Jobs API to LLM-powered applications. It allows AI assistants like Claude and Cursor to query B2B data directly using an API key for authentication. See the MCP docs at https://docs.coresignal.com/mcp/coresignal-mcp.
Does Coresignal have a public API?
Yes — Coresignal ships a REST API. Docs: https://docs.coresignal.com/api-introduction/apis-overview.
How much does Coresignal cost?
Coresignal: pricing is usage-based, expect higher tier ($$$) spend. Full pricing page: https://coresignal.com/pricing/.
Who is Coresignal best for?
Coresignal is built for RevOps, GTM Engineer, Marketing. Fits Mid-market (50-500), Enterprise-sized teams.
How well does Coresignal fit an agentic sales stack?
Tier: Native. Has both an MCP server and an agent-friendly API — drops into an agentic stack with minimal glue code.