The first Siri Extension builder kit for iOS 27 — Swift Package + testing app with pre-built intent templates and Claude/Gemini integration, shipping post-WWDC.
| Name | .com | .io | App Store Clear? | Trademark Risk | Score |
|---|---|---|---|---|---|
| ExtendSiri | ✅ Free | ❌ Taken | ✅ Clear | Low | 8/10 |
| SiriForge | ❌ Taken | ✅ Free | ⚠️ Similar | Medium | 6/10 |
| IntentLab | ✅ Free | ✅ Free | ✅ Clear | Low | 7/10 |
| SiriKit Pro | ❌ Taken | ❌ Taken | ❌ Taken | Medium | 4/10 |
| AgentKit | ✅ Free | ✅ Free | ✅ Clear | Low | 7/10 |
Apple confirmed Siri will open to third-party AI chatbots (Claude, Gemini, ChatGPT) via a new Extensions system in iOS 27, announced at WWDC June 8, 2026. The iOS developer services market is $57.5B growing at 15% CAGR. With 28-36M registered Apple developers and tens of thousands of AI apps needing Siri integration, the demand for tooling is guaranteed. Apple's initial documentation will be minimal (typical for new frameworks). The first-mover window: June 8 to September 2026 (iOS 27 public release).
Monetization model, marketing strategy, and the #1 complaint from users for each.
Free (Apple)
Free, built into Xcode. Original Siri integration framework since iOS 10. Limited intent domains.
WWDC sessions, Apple documentation, developer forums.
Limited intent domains; requires extensive boilerplate code; documentation is sparse for new features on day one.
Unverified
Free developer toolkit for building AI agents. Revenue from API usage. Launched March 2026.
OpenAI brand, developer community, major tech press coverage.
Cloud-only; not specifically for Siri Extensions; general-purpose AI agent framework, not iOS-specific.
Free (Apple)
Free. SwiftLint, JSON converters, code generators extend Xcode editor. Community-built.
GitHub repos, developer blogs, WWDC sessions.
Editor-only extensions; no Siri integration tools; limited to code editing, not app feature building.
Unverified
Framework for multi-agent AI systems with orchestration. Free SDK, paid cloud deployment.
Developer community, GitHub stars, technical blog posts.
Generic agent framework; not iOS/Siri-specific; requires significant customization.
Included in $99/yr
CI/CD service included in Apple Developer Program ($99/yr). Automated testing and deployment.
WWDC integration, Xcode built-in, Apple developer ecosystem.
Build-and-deploy tool only; no extension templates; no Siri-specific testing capabilities.
Apple's SiriKit is the raw framework with sparse documentation. OpenAI and Inngest offer generic agent SDKs. NO tool provides pre-built Siri Extension templates, a testing harness for intent validation, or one-click Claude/Gemini/ChatGPT integration. The first tool to ship post-WWDC captures the 3.5-month exclusivity window before iOS 27 public release.
| Element | Recommended Copy | Char Count |
|---|---|---|
| App Store Title | ExtendSiri: Siri Dev Kit | 24/30 |
| Subtitle | Build iOS 27 Extensions fast | 28/30 |
| Primary Category | Developer Tools | — |
First-mover advantage is real and the 3.5-month exclusivity window (June 8 → Sept 2026) guarantees demand. Developer tools command high willingness to pay ($29.99 is reasonable for this category). However, the critical blocker is that the Siri Extensions API doesn't exist yet — can't build until WWDC reveals the framework on June 8. Apple could ship excellent built-in Xcode templates, collapsing the opportunity. Best strategy: prepare boilerplate, UI templates, and documentation NOW, then adapt to the actual API within 48 hours of WWDC keynote.
| Biggest Risk | Biggest Opportunity |
|---|---|
| Can't build until June 8 WWDC reveals the actual API. Apple may ship excellent built-in Xcode templates by Q1 2027. | Guaranteed demand from 28-36M registered developers. 3.5-month first-mover window. $29.99 price point with developer willingness to pay. |
Bundle ID and IAP product IDs must be created in App Store Connect first. Mismatches are the #1 cause of upload failures.
com.extendsiri.extendsiriRegister in Apple Developer Portal → Certificates, IDs & Profiles → Identifiers
$29.99 one-time purchase. Includes Swift Package + testing app + templates.
Active Swift/iOS developers (indie devs, startup CTOs, agency developers) who need to integrate AI chatbots with Siri post-WWDC.
| # | Feature | Why It Matters | Session |
|---|---|---|---|
| 1 | Pre-Built Intent Templates | Skip the boilerplate — start with working Siri intents for common use cases (Q&A, actions, search) | S2 |
| 2 | Siri Extension Test Harness | Visual testing UI to validate intents without deploying to device — saves hours of debugging | S5 |
| 3 | Claude/Gemini/ChatGPT Connector | One-click AI chatbot integration templates — the #1 use case for Siri Extensions | S5 |
| 4 | Intent Validation & Debugging | Real-time intent validation showing exactly what Siri receives and returns — no more guessing | S6 |
| 5 | App Store Submission Checklist | Automated checks for Extension requirements before App Store submission — avoid rejection | S7 |