This guide showcases real ways customers are using our API to bring Harmonic data into their systems and workflows. If you're curious about what's possible or looking for inspiration, check out these examples.
CRM integration & enrichment
What teams are actually building:
Pushing company data into Affinity, Attio, Salesforce, HubSpot, and more, so they don't have to manually research or update records
Adding custom Harmonic fields in CRMs that show web traffic, engineering/sales/product team growth, and additional signals for spotting momentum
Setting up automatic alerts when companies in their watchlists hit certain growth thresholds
Two-way sync between Harmonic lists and their CRM pipelines
Bringing in proprietary data by syncing deal notes, scoring, and relationship context from CRM to Harmonic
Customer example: Airtree Ventures
One of Australia's largest VC firms, Airtree ($2B AUM), uses Harmonic's integration with Affinity CRM to power their sourcing workflow across their team:
"I like to meet the investors where they're at," explains Marnix Denys, who leads data at Airtree. "Some are digging into Harmonic directly, setting up their own Saved Searches. Others stay in our CRM, so we pipe curated lists straight into Affinity."
Their approach showcases the flexibility of Harmonic's API:
Lists created in Harmonic automatically sync to Affinity, creating a unified view
Team members can work in their preferred system (Harmonic or CRM)
The integration surfaces reengagement opportunities when previously tracked companies evolve
Dealflow & Scoring Systems
What teams are actually building:
Alert systems that ping Slack when companies match specific criteria
Dashboards showing startup trends across their target sectors
Trackers that monitor competitors to their portfolio companies
Custom scoring models that combine Harmonic signals with their own data points
Customer example: Valo Ventures
Valo Ventures, a thesis-driven VC firm investing in climate solutions, uses Harmonic's API to build a two-way sync with their CRM that continuously improves their deal scoring:
"The first and most impactful way we leverage Harmonic's data is for sourcing new high quality leads aligned with our investment strategy that we otherwise might not have seen," says Sam Suskind, Principal at Valo.
Their implementation showcases advanced API use cases:
Automated importing of relevant companies into their Affinity CRM
Reverse-sync from their CRM back to Harmonic to tune relevance scores
Companies qualified or disqualified in CRM automatically update the scoring model
Investment intelligence & research platforms
What teams are actually building:
Proprietary investment engines combining Harmonic with other data sources
Research platforms that track specific sectors, technologies, or regions
Custom dashboards with scoring algorithms and filtering capabilities
Tools that analyze hiring patterns and growth trends across industries
Portfolio monitoring and competitive intelligence systems
Real-World Integration: MVP Ventures
MVP Ventures uses Harmonic's API to identify and rank companies within their investable universe:
"Harmonic does very well flagging companies early on in their creation—frequently even before they have a website," says Jason Mintz, Partner and CTO. "That data allows us to spend our time doing what matters most—talking with founders about the things we might not know, and can't learn elsewhere."
Their implementation includes:
Weekly syncing of new companies from Harmonic into their data warehouse
Continuous enrichment of company profiles with growth metrics
Proprietary scoring algorithms powered by Harmonic data
Systematic monitoring of ~1 million companies in their investable universe
Advanced automations & AI workflows
What teams are actually building:
Personalized outreach systems that combine Harmonic company data with contact information from other sources
AI-powered email generation using Harmonic's proprietary data to create relevant, personalized messages
Automated lead qualification workflows that prioritize founders based on Harmonic signals
Custom notifications when specific company milestones are reached
The API makes these workflows possible by providing structured, reliable data that can be combined with other tools and services. We've seen customers build everything from automated sales outreach to founder identification systems powered by LLMs.
Data warehouse integration & bulk share
What teams are actually building:
Ingesting Harmonic's entire company dataset into their data warehouse (BigQuery, Snowflake, S3)
Joining Harmonic data with proprietary datasets for comprehensive analysis
Building custom ML models on top of structured company, people, and investor data
Creating automated data pipelines that refresh with weekly updates
Customer example: NGP Capital
NGP Capital ($1.6B under management) built an internal data platform called "Q" powered by Harmonic's bulk data:
"We use Harmonic across the entire funnel," says Atte Honkasalo, VP of Data & Analytics at NGP. "From discovering companies, to evaluating them, to understanding momentum—it's an essential part of our workflow."
Their implementation shows how bulk data powers sophisticated platforms:
Weekly data refreshes from Harmonic feed their custom ML models
Clean, structured data serves as a foundation for their proprietary scoring
The team focuses on differentiation rather than rebuilding data infrastructure
Momentum and traction signals help identify rising companies before traditional milestones
How to Get Started
Most customers implement in one of these ways:
Option 1: No/Low-Code Route (Fastest)
No-code ETL between Harmonic and your CRM
Works with Affinity, Attio, Salesforce, HubSpot, and more
Most customers get this running in a few days
No real engineering resources needed
Connect Harmonic to thousands of other apps
Set up alerts based on data changes
Build automated workflows
Good for teams with minimal dev resources or for quick prototyping
Option 2: Custom API Integration
For teams with engineering resources:
We support both REST and GraphQL (most use GraphQL for nested queries)
Our standard rate limit (10 requests/second) handles most use cases
Docs and examples: https://console.harmonic.ai/docs/api-reference/introduction
Option 3: Harmonic Bulk Share
For larger orgs with specific requirements:
Direct data feeds to Snowflake, BigQuery, S3
Company, People, Investor, and Company Round by Round Funding tables
Implementation guidance from Harmonic SE team
Quick Start Guide
Pick something specific - Start with one clear use case like CRM enrichment
Choose your approach - Polytomic if you want high scale and low maintenance, custom if you need flexibility
Check our API reference
Check out all the Harmonic data fields you can take advantage of
There is a ton you can do with Harmonic API, and the examples above are just the beginning. Talk to our team - we can help plan your specific implementation!
Want to talk specifics? Email solutions@harmonic.ai and we'll connect you with our Solutions Engineering team to discuss your implementation.