Apple Is Opening Siri to Every AI in iOS 27 — Which One Should You Pick?

Apple confirmed it. Bloomberg reported on March 26, 2026 that iOS 27 will open Siri to rival AI assistants beyond ChatGPT — meaning any qualifying AI can become your default Siri backend. Here is what that means, who the candidates are, and which AI is actually worth picking.

How We Got Here: The Siri AI Timeline

What "Opening Siri to Rivals" Actually Means

The Siri Extensions API works like this: when you ask Siri something it cannot handle well — or when you've set a third-party AI as your default — Siri passes the request to that AI and speaks the response back to you.

With ChatGPT as the only option, this was mostly used for open-ended questions Siri couldn't answer. iOS 27 changes the model entirely. Any AI that meets Apple's privacy and performance requirements can register as a Siri Extension. You set one as your default. Every request goes there first.

The Candidates for Your iOS 27 AI Slot

As of March 2026, the likely candidates for iOS 27 Siri integration are ChatGPT, Perplexity, and Happycapy. Here is what each one actually does when Siri hands it a request.

Why Memory Makes Happycapy the Right Siri AI

Siri's biggest frustration is that it forgets everything. You tell it your preferences, it ignores them next time. You explain your project, it has no idea who you are the following morning. The AI you route Siri to inherits this problem — unless it has persistent memory built in.

Happycapy solves this directly. Every session updates your MEMORY.md — a persistent context file with your name, projects, preferences, and habits. After two weeks of use, you never re-explain yourself. A Siri request like "schedule a meeting with my usual format" just works because Happycapy already knows your usual format.

ChatGPT has a "Memory" feature, but it is opt-in, manually managed, and resets if you start a new chat or use the API via Siri Extensions. Happycapy's memory is automatic, always-on, and specifically designed to carry context across sessions — including Siri-triggered ones.

The Agent Stack Advantage

iOS 27's expanded Siri Extensions API includes action primitives. That means your AI won't just answer "what's the weather" — it can draft an email, run a workflow, and deliver results. Perplexity can't do this. ChatGPT can do parts of it. Happycapy was built for it.

The combination that matters for Siri use cases:

• Mac Bridge — Siri triggers Happycapy, which controls your desktop. Open apps, move files, run scripts.
• Capymail — Ask Siri to research a topic and email you the results. Happycapy does the research and emails you without keeping your phone open.
• 150+ skills — PDF extraction, image generation, Supabase queries, Reddit post writing. Siri hands it off; Happycapy executes the whole workflow.
• Persistent memory — Every Siri request has full context from previous sessions. No re-explaining.

What to Do Before iOS 27 Ships (Fall 2026)

iOS 27 ships in approximately six months. The AI you pick for Siri will be more useful if it already knows who you are when the extension goes live. Here is the smart preparation sequence:

1. Sign up for Happycapy (free tier works to start)
2. Run a few conversations — your agent starts building your MEMORY.md automatically
3. Try Mac Bridge to get used to desktop automation via conversation
4. By the time iOS 27 ships, Happycapy will already know your workflows, preferences, and projects
5. Set Happycapy as your Siri Extension when iOS 27 goes live — full context from day one

Frequently Asked Questions