Why did we build a WordPress SSO plugin?

Bread & Butter started as a single sign-on (SSO) plugin for WordPress. This article explains why we built it for WordPress first, and what the plugin does for WordPress sites today.

In short: We built it so anyone could add sign-in options like Google, Okta and OneLogin to an existing site without writing the code themselves. We launched on WordPress first because it runs more of the web than any other platform. W3Techs reports that it powers 40.2% of all websites. The plugin still adds one-click sign-in from Google, Microsoft, LinkedIn, Apple and more, and today it also turns those sign-ins into verified, scored leads.

Why WordPress first

WordPress runs much of the web

When we launched in November 2019, WordPress was already the most popular content management system (CMS). It still is. According to W3Techs, WordPress is used by 58.8% of all websites whose CMS is known, which is 40.2% of all websites. It's free, it's easy to use, and because so many sites run on it, most publishers and agencies already know it well.

The WordPress community

A platform that popular comes with a huge community: the developers who build WordPress itself, and the people behind the plugins that extend it. The WordPress Plugin Directory now lists more than 73,000 free plugins. It's where WordPress site owners go to find new tools, and it lets both free and commercial products reach them. We use plenty of those plugins on our own site too, so putting Bread & Butter there was an easy decision.

Sign-in is hard to build and harder to maintain

Adding SSO to a login screen yourself is a lot of work, and supporting it afterwards is tedious and risky. Every provider changes its requirements over time. When that happens, someone has to update the code, test it and deploy it again, or your sign-in breaks.

Login and access code is also where security mistakes do the most damage. In Patchstack's State of WordPress Security in 2026 report, researchers found 11,334 new vulnerabilities in the WordPress ecosystem in 2025, 42% more than in 2024, and 91% of them were in plugins. Broken Access Control, where a flaw lets someone reach things they shouldn't, was the most exploited type. Patchstack notes these attacks are hard to spot because they look like normal traffic from signed-in users.

That's the case for handing sign-in to a team whose whole job is keeping it working and up to date, instead of maintaining custom code on every site you build.

We started by helping digital agencies and web developers add SSO in the simplest way possible, so easy that building it themselves wouldn't be worth considering. Releasing a WordPress plugin removed even more of that work.

What the plugin does today

Sign-in is still at the heart of Bread & Butter, but the plugin now does much more with each one:

  • One-click sign-in. Visitors sign in or sign up with Google, Microsoft, LinkedIn, Apple and other social accounts, with enterprise providers such as Okta and OneLogin, with a sign-in link, or with a verified email address.
  • Works with your existing forms. Bread & Butter works alongside Contact Form 7, WPForms, Gravity Forms, Ninja Forms, Formidable, Elementor and newsletter blocks, so there's nothing to rebuild.
  • A members' login page. The Member's Area places a complete sign-in and sign-up experience on your own page, and new members are added to your WordPress users.
  • Content gating. Lock premium pages behind one-click sign-in with a Content Gate Preview.
  • Verified, scored leads. Every sign-in becomes a verified profile with a Focused Score that rates buying intent from 1 to 10, and syncs to your CRM.
  • Attribution. See which campaigns, channels and keywords bring in verified leads.

There's a Free plan, and paid plans unlock more features. The plugin is on the WordPress Plugin Directory, and if you're not on WordPress, you can add Bread & Butter to any site with the JavaScript snippet.

Tell us what you need

Have a question about the plugin, or need an identity provider we don't support yet? Contact us and we'll help you get set up. Reviews on the WordPress Plugin Directory help other site owners find us, and your feedback shapes what we build next.

Sources

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