Primer

ActiveOn the United Kingdom Radar · not ranked

Payments infrastructure that lets merchants connect and route between many payment providers and methods through one integration.

Fintech›payments orchestration primer.io

Last roundSeries C · May 2026

Why Primer is not ranked yet

How the Radar works →

The Radar lists every known eligible company, sorted by date of last round, with no AI judgement. Primer enters the ranking once its public data is sufficient for the AI to estimate it. Next United Kingdom edition: 3 Jan 2027.

Funding history

Date	Round	Amount	Type	Investors
May 2026	Series C	USD 100M	—	Sofina, Peak XV, Balderton, Accel, ICONIQ

Rounds as cited by Uback’s rankings. Equity, debt and grants are shown separately; only equity rounds count towards the valuation anchor.

Uback rankings

How the AI ranks →

Ranking	Tier	Rank	Edition	Next update
United Kingdom · all sectors	Radar	—	Edition 0 · October 2026	3 Jan 2027

Independent analyses

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What the AI reads

Read by the AI at the next edition.

Comparable companies in United Kingdom

Full United Kingdom ranking →

Revolut#1Fintech › financial super-appHectocorn Checkout.com#3Fintech › online paymentsDecacorn SumUp#4Fintech › payments for small merchantsUnicorn Monzo#6Fintech › digital bankUnicorn

Investors in Primer: Sofina · Peak XV Partners · Balderton · Accel · ICONIQ

Last updated: Oct 2026Report an error

Uback is a content publisher and an aggregator of non-binding expressions of interest. It provides no investment advice, receives no mandate and takes part in no transaction. Rankings, ranges and brackets are editorial estimates produced by AI, purely indicative.