NEWCaplight raises a $16M Series A, led by BlackRock and Fin Capital →
Skip to main content
Caplight Logo









Harper

Harper

Private
Denver, ColoradoAI, Data & Cloud Infrastructurehttps://www.harper.fast/

Last Round

Series A

Feb 25, 2026

Total Funding Raised

$47.45M

Company Overview

Harper is a software company that provides an open-source Node.js performance platform that unifies database, cache, application, and messaging layers into one in-memory process.

Sector

AI, Data & Cloud Infrastructure

Verticals

Cloud Infrastructure, Database Management, Serverless Computing, DevOps & Containers

Business Model

B2B

Customer Profile

Usage-Based SaaS, Subscription SaaS

AI Layer

Infrastructure

Keywords

unified runtimein-memory databaseagentic engineeringdistributed systemssemantic cachingvector searchserverless runtimebackend-as-a-servicebaaslow-latency infrastructureapplication platformnode.js runtimeedge computingdeveloper toolsvibe coding

Historical Pricing

Historical view of private secondary pricing and transaction trends.

Unlock Pricing Charts

Sign up to view complete historical pricing and secondary transactions.

Caplight Momentum Score

Proprietary index based on bid/ask volume and sentiment.

View Momentum History

Track how buyer interest and sentiment changes over time.

Harper Comparables

Compare Harper with similar companies based on industry and business-model similarity.

Harper comparables — related companies by embedding similarity
CompanySimilarityMarket Cap

View Full Comparables Set

Access detailed peer comparisons, similarity scores, and market data.

Harper Funding Rounds

Historical fundraising activity

Data table
RoundDateAmount RaisedValuationInvestorsSources
Series AFeb 25, 2026
SeedMar 1, 2025
Pre SeedJun 10, 2019

Key People

Founding team and executive leadership

Stephen G.

CEO

Executive Team

Anna Kummerlowe

Chief Operating Officer

Executive Team

Harper Investors

Notable investors and investment history

Harper investors
InvestorRounds
Lobster CapitalSeries A, Seed
Peak XV PartnersSeries A, Seed
AntlerSeries A, Seed
Y CombinatorSeries A, Seed
10x FoundersSeries A, Seed
Outset CapitalSeries A, Seed
Emergence CapitalSeries A

Harper Filings

SEC and related filings with document metadata.

Data table
TypedDateAmount OfferedAmount SoldFillingPagesDownload
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation
Sign Up to view
Mock Valuation

Harper Filings

SEC and related filings with document metadata.

Frequently Asked Questions

Common questions about Harper's valuation, stock price, and market status.

Firmographic Details

HeadquartersDenver, Colorado
Employee Range44
Year FoundedN/A
Last FundingFeb 25, 2026

Institutional Data Access

Join leading institutional investors using Caplight to access private market data, discover pricing, and execute secondary block trades.

Requires verified institutional or accredited status.