Userbase

Open source service for user accounts and encrypted data storage on static websites.

Developer toolsEncryptionOpen sourceSaaS

Active^{Source [4]}^{Source [1]}Last verified Oct 2, 2026

About Userbase

Userbase adds user accounts and data persistence to static websites through a browser JavaScript SDK. Data is encrypted in the browser with user-controlled keys and queried client side.^{Source [4]}

It is fully open source under the MIT license and can be self-hosted, or run by Userbase as a hosted service.^{Source [4]}^{Source [2]}

Its About page describes it as a small independent business in Seattle with no investors, signed by Daniel Vassallo as founder and owner, and credits Justin Berman, Luca Cipriani and Tony D'Addeo for development.^{Source [3]}

What happened

Daniel Vassallo started Userbase in 2019 after leaving Amazon, offering a JavaScript SDK that handles sign-up, login and end-to-end encrypted data for static sites with no backend. It earned far less than he hoped, about $10,000 a year according to Community Inc., but still operates as an MIT-licensed open source project with a hosted paid option, and is listed for sale on TrustMRR.^{Source [1]}^{Source [4]}^{Source [3]}^{Source [5]}

Timeline

2026Listed for sale on TrustMRR.^{Source [1]}^{Source [6]}
2019-05Public GitHub repository created.^{Source [2]}
2019-02Founded, per TrustMRR.^{Source [1]}

Products and brands

Userbase SDK: JavaScript SDK for sign-up, login and encrypted storage from the browser.^{Source [4]}
Userbase hosted service: Managed, serverless hosting of the open source backend.^{Source [4]}

How it makes money: Paid subscriptions for the hosted service, with a free admin account and a self-hostable open source version.^{Source [4]}^{Source [1]}

Leadership

Daniel Vassallo

Founder and owner^{Source [3]}

Since 2019

Funding and financials

Revenue: $20,971 all time; $95 MRR from 16 subscriptions (Stripe-verified on TrustMRR, as of October 2026)^{Source [1]}
Annual revenue: About $10,000 a year (reported by Community Inc.)^{Source [5]}

People on Founded, and where they went next

1 person on record, connected to 4 other companies.

Person	Here	Also built
Daniel Vassallo	Founder and owner2019 to now	FULL SEND2026 to nowActiveSmall Bets2021 to nowAcquiredGumroadActiveAmazon2019IPO

Sources

Userbase, TrustMRR. Accessed Oct 2, 2026.
smallbets/userbase repository, GitHub. Accessed Oct 2, 2026.
About Us, Userbase. Accessed Oct 2, 2026.
Userbase: Logins and persistence for static sites, Userbase. Accessed Oct 2, 2026.
How Daniel Vassallo Grew a Group of Small-Time Entrepreneurs to $1M, Community Inc.. Accessed Oct 2, 2026.
Daniel Vassallo (@dvassallo): 2 startups, TrustMRR. Accessed Oct 2, 2026.

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