Alternatives

Products that do what Firstline does

Authentication made simple

1
One Account▲176
1 click sign-ups
2021
2
Passage by 1Password▲236
Frictionless security: auth & user management with passkeys
2023
3
Passage▲286
Biometric authentication at your fingertips.
2022
4
DID▲180
The simplest way to add passwordless auth to websites & apps
2020
5
Octauthent▲129
Add a login form to any website, without a line of code
2021
6
Clerk▲280
Authentication and user management for React and Next.js
2021
7
AuthGuardian by OneGraph▲185
The easiest 3rd-party sign-in for your apps and APIs
2020
8
SuperTokens Passwordless▲173
Fully flexible, open source auth in 15 minutes
2022
9
PropelAuth▲178
Authentication that works before you write any code
2022
10
Clerk▲238
More than authentication, complete user management
2022
11
DashboardAuth▲85
User management for Retool, Streamlit & more
2022
12
Protected App by Logto▲117
Build auth in clicks, no code required
2024
13
PropelAuth▲112
Flexible auth for B2B products
2023
14
MonoCloud for Startups▲167
One identity layer for your customers, APIs, and agents
Jul 2026
15
NoPass.me▲129
Open-source identity verification
2021
16
Feather Auth▲184
Build an entire sign-in flow in 5 minutes or less.
2020
17
MojoAuth 2.0▲263
Easiest way to add passwordless login to your apps & website
2022
18
1Password Developer Tools▲105
Develop faster, eliminate complexity, protect your secrets
2022
19
Authentiq▲157
Strong authentication, without the passwords
2017
20
Masked Emails by 1Password▲164
Protect your online privacy with unique email addresses
2021
21
OwnID▲201
An easy and secure passwordless add-on for your website
2022
22
Simple OTP 2.0▲131
Passwordless, source-code-included auth for your website
2024
23
ID Verify by Trueface▲169
Simplest way to verify identities online
2018
24
FramerAuth▲179
Authentication for Framer websites
2024

Ranked by how close each launch is in meaning, then by votes. Refine with a description →