Harmonic

Harmonic is a startup database tracking companies and people as they hire, raise funding, launch products, and change direction. Its Console and Bulk Data offerings list 40 million companies, 200 million people, and 250 thousand investors. Harmonic says it combines legal filings with dozens of public sources and refreshes the information regularly. Scout lets users ask about startups or schedule AI agents to find, evaluate, and track companies, people, deals, and markets. Network Mapping connects LinkedIn relationships, email and calendar events, and CRM engagements with companies and operators in the database. The service is presented for venture capital, growth capital, corporate innovation, and go-to-market prospect discovery. Access includes REST and GraphQL APIs, MCP connectivity, and bulk delivery through S3, BigQuery, or Snowflake. Integrations include Slack alerts, Google accounts, Affinity, LinkedIn connections, Polytomic, and Zapier. Console, API, and Bulk Data pricing is available on request. Harmonic lists ISO 27001 certification and SOC 2 Type II compliance. Users can receive up to $750 of Scout credits monthly, while the Scout API has a $250 free credit allowance.

Harmonic combines startup intelligence, network context, and programmable data access. Its broad coverage and Scout workflows support research and prospect discovery, while pricing requires direct contact.

Harmonic suits investment, innovation, and prospecting teams that need company, people, investor, and network data. It is also relevant to organizations wanting API, bulk-data, or scheduled-agent access.

Harmonic is a startup database that tracks companies and people as they develop. It is best suited to investors and teams seeking startup intelligence, prospect discovery, or data access at scale. Its combination of broad coverage, network context, and Scout workflows is compelling, though custom pricing makes it harder to assess against a budget.

Overview

Harmonic draws on legal filings and dozens of public sources, refreshing its data regularly. Its coverage spans 40 million companies, 200 million people, and 250,000 investors for Console and Bulk Data. Firmographic and business-change data, plus company matching, make the database useful for finding companies and tracking shifts such as hiring, fundraising, product launches, and changes in direction.

Network Mapping connects LinkedIn connections, email and calendar events, and CRM engagements to companies and operators in the database. That context can help a firm surface relevant relationships alongside company research. For this feature, Harmonic says data is isolated to the firm, encrypted at rest with database row-level security, and limited to email subject lines and meeting participants.

Key features

Scout and network context

Scout supports questions about startups and scheduled AI agents that find, evaluate, and track companies, people, deals, and markets. That makes it more than a lookup tool: teams can use it for ongoing discovery, though Scout usage has a monthly credit allowance rather than unlimited free access. Each user gets up to $750 in Scout credits per month, and the Scout API has a separate $250 free credit allowance.

Native integrations include Slack alerts, Google accounts, Affinity, and LinkedIn connections. Polytomic and Zapier provide additional connection options. Harmonic also offers REST or GraphQL API access, MCP connectivity, and bulk delivery through S3, BigQuery, or Snowflake. This range suits teams that want to bring startup data into existing workflows or data infrastructure.

Pricing

Harmonic is paid, with custom pricing for Console access, API access, and Bulk Data. A free trial is available, but there are no fixed plan prices to compare before requesting pricing.

• Console access: Includes the 40 million company, 200 million people, and 250,000 investor database, Scout, Network Mapping, CSV export, MCP trial credits, and enterprise security and compliance. This is the fit for teams researching directly in the product and using relationship context.
• Bulk Data: Includes the full dataset, weekly refreshes, and delivery through S3, BigQuery, or Snowflake. Financing and investor data is an add-on. It is aimed at teams that need data delivered into their own systems rather than relying only on Console workflows.
• API access: Provides API data access and MCP access. Financing and investor data, no-code CRM sync, and Scout via API are add-ons, so buyers should account for those separately when deciding whether this route covers their workflow.

The pricing page states that Harmonic is ISO 27001 certified and SOC 2 Type II compliant. Email support is available at [email protected].

Platforms

Harmonic supports API, extension, iOS, and web. Scout is linked through the web app, iOS app, API documentation, and Slack; Scout through MCP is marked as coming soon. The platform range gives users several ways to work with Scout and the data, while MCP availability for Scout is not yet presented as ready.

Who it's for

Harmonic is positioned for venture capital, growth capital, corporate innovation, and go-to-market prospect discovery. It is a strong fit when a team needs startup and people coverage alongside relationship mapping or wants to integrate data into its own stack. It is less suitable for buyers who need transparent, fixed pricing before engaging with a vendor.

Pros and cons

• Pros: Broad company, people, and investor coverage supports both startup research and prospect discovery.
• Pros: Network Mapping ties company records to professional connections and CRM activity, adding relationship context to prospecting.
• Pros: API, MCP, and warehouse delivery options accommodate teams with different data workflows.
• Cons: Console, API, and Bulk Data use custom pricing, making budget comparisons difficult without requesting a quote.
• Cons: API add-ons for financing and investor data, no-code CRM sync, and Scout can complicate plan evaluation.
• Cons: Scout's free credits are capped, and Scout through MCP is not yet available.

Alternatives

For technology lookups and website alerts, Wappalyzer offers a free plan with 50 technology lookups and 50 email verifications per month, plus five website alerts. Choose it when those capped checks are more relevant than Harmonic's startup and relationship coverage.

BuiltWith offers a free tier of 10 detailed lookups per day and an Advanced plan at $144 a year, with a one-year minimum. It is a more straightforward option for buyers who want a stated annual price and detailed lookups.

Coresignal has a free tier with 2,000 credits, a 5 requests-per-second limit, and a 7-day trial; its Mini plan costs $49 a month for 2,500 credits per month. Consider it when a defined credit allowance and starting monthly price matter more than Harmonic's startup-specific workflow mix.

The Official Board is another option for organizational chart data.

Clay has a free plan with 500 actions per month, 100 data credits per month, unlimited seats and tables, and up to 200 rows per table. It may suit teams prioritizing lead-enrichment workflows within those free limits.

Elvesora Enrichment offers a $30 a month month-to-month plan with 1,000 enriched company records per month, REST and remote MCP, bulk list processing, and XLSX export. It is worth considering when a published monthly price and a defined company-record quota are priorities.

Enigma has a free plan with console access, standard rate limits, viewing, search, and live summaries. Choose it if those free console functions are sufficient.

PredictLeads is another alternative for company data and API access.

Browse Startup Databases or Account Enrichment Software for more options.

Verdict

Harmonic is best for venture, growth, corporate innovation, and go-to-market teams that need startup coverage connected to people, relationships, and data workflows. Its breadth and Scout capabilities are the clearest reasons to choose it; custom pricing and separately priced add-ons are the main reasons to compare alternatives before committing.