Primer

Primer builds payments infrastructure for merchants.

Stablecoins Fintech CybersecurityY CombinatorSeedcamp

Latest funding

$100M Series B+ · May 20, 2026

Led by Sofina · Source: finsmes.com

Total raised: $172.36M across 4 sourced rounds

All 5 rounds ↓

Website: primer.io.

X: @primer_io · 666 followers.

LinkedIn: primerapi.

Categories: Stablecoins Fintech Cybersecurity.

Sectors: developer-tools, fintech.

Stage: Series B+.

Based in: London, United Kingdom.

Founded: 2019.

Total raised: $172.36M in 4 sourced rounds.

Last round: May 20, 2026 · 176 days ago.

Headcount: 51–100 employees.

On Recent Funding since: Sep 28, 2026.

Signals

X account@primer_io · created Nov 28, 2019 (6 years old) · 666 followers

Website registeredJul 12, 2014 (12 years old)

About Primer

Its platform helps businesses manage and optimize payment operations through a single platform, connecting with multiple payment service providers, fraud prevention tools, and digital wallets. Primer provides tools for payment routing, transaction monitoring, reconciliation, and workflow automation.

TIMELINE · MONEY RAISED

Primer | 165 days from X account to first raise on record

@primer_io·Raised $172M in 4 sourced rounds·1 signal before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

May 20, 2026
Series B+ · $100M
SSofina (lead)
Source: finsmes.com
October 19, 2021
Series B+ · $50M
IICONIQ Growth (lead), AAccel, BBalderton Capital, RRTP Global, SSeedcamp, SSpeedinvest
Source: dlvr.it
November 29, 2020
Series A · $18.66M
AAccel (lead), BBalderton Capital, KKinled Holding, RRTP Global, SSeedcamp, SSpeedinvest
Source: dlvr.it
May 11, 2020
Seed · $3.7M
BBalderton Capital (lead), SSeedcamp, SSpeedinvest, TTaavet Hinrikus
Source: edsurge.com
November 28, 2019
X account created
2019
SSeedcamp · batch
Source: seedcamp.com
July 12, 2014
Website created

Founders and team

GL
Gabriel Le Roux Co-founder & CEO

LinkedIn · source: primer.io
PA
Paul Anthony Founder

LinkedIn · source: primer.io
AM
Alex Mallet CTO
VB
Vik Bhatti Senior Engineering Manager

Investors

Companies like Primer

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TTapi$27M Series B+ · Feb 2026
TThepeerSeed · Apr 2024
DDrona Pay$500K Seed · Nov 2021
PProper$19M Series B+ · Mar 2023

Other companies backed by Sofina

EExein$270M Series B+ · Sep 2026
EEye Security$63.6M Series B+ · Jul 2026
XXBOW$35M Series B+ · May 2026
TTalkiatry$210M Series B+ · Feb 2026
TThe Whole Truth$51M Series B+ · Feb 2026
MMistral AI$18M Series B+ · Aug 2024

Sofina portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/primer (get a free API key).