The Diary
Putting the patient in control.
Reza Satari
- Apple
- Meta
- Atlas Metrics
- PREMATCH
- Qorelo
- The Diary
- Capch
- FullDrop
About
Hi, I’m Reza! I’m a senior operations generalist with more than 15 years of experience (I started young 👶🏽).
I grew up in the States surrounded by ambition and intellectual pursuit (my mother has seven degrees, so it’s in my DNA) and started my first company at 13.
In 2011 I co-founded The Diary, a digital-health platform that was acquired in 2016. Later I led engineering and launch teams at Apple, Twitter and Meta, and alongside Meta co-founded Hijabi Rentals, an EV rental business that grew from $12K to about $500K ARR in under a year before it sold. Three years ago I moved to Berlin, where I’ve helped scale organisations at European startups.
Along the way my work has spanned engineering, finance, people, legal, go-to-market and more. I also write production code, these days with help from AI, and built most of the projects below myself.
Interested in things that make an impact: voice AI, AI agents, compliance and policy, modernisation, legal, autonomous systems and consumer AI.
Outside of work I host dinner parties where I’m the chef, shoot portraits and events, travel the world and snowboard whenever the powder hits. I’m also a coffee enthusiast and know the best spot in Berlin (Yva Cafe, opens Google Maps in a new tab) for coffee.
Projects
Capch
Original-quality photos for friends and groups.
Corrovia
The evidence layer for professional identity.
DocVerify
Answers from your documentation, with proof.
Graith CTS
A mobile transfer engine that finishes the job.
FullDrop
Original photos and videos, delivered by link.
Winnow
The CRM cleaner.
Kolleg
An HRIS for small companies that would rather not run one.
Orchard
Your Apple devices, working as one.
9,198 commits in 2026
The Diary
Putting the patient in control.
A digital-health app and web platform that connected patients with their care providers. The patient’s whole health story sat on one page, so care could be built around the person instead of a five-minute appointment.
- Role
- Co-founder and CPO, 2011 to 2016
- Status
- Acquired by a health-tech firm in 2016.
Why it exists
My own family got subpar care. They would walk into a five-minute appointment carrying a diary of habits, diets, symptoms and daily notes, and none of it made it into their treatment. We digitised that diary and put it in front of the doctor.
What it does
- Patients kept habits, diet, symptoms, medications and documents in one place instead of a paper notebook.
- An iOS app with voice dictation, custom tracking, reminders, Apple Health and device sync, and document scanning.
- An Apple Watch app with care reminders and tap-and-talk health logging.
- The Diary CarePro for providers: the patient’s full health story on one page, built on Apple’s CareKit.
How we grew it
- Partnered directly with doctors’ offices, including the Integrative Pain Center of Arizona, where The Diary ran multi-provider patient rounds.
- The 2016 sale returned capital to investors.
Capch
Original-quality photos for friends and groups.
An iPhone app for sharing photos and videos privately with friends and groups, at their original quality. No feeds, no followers, no compression.
- Role
- Co-founder and CEO
- Status
- Retired in 2026. The transfer engine lives on in Graith CTS and FullDrop.
- Built with
- Swift
- SwiftUI
- Supabase
- Cloudflare R2
- Firebase Cloud Messaging
Why it exists
Shared photos get compressed and scattered across a dozen chats. Capch gave every friend and group one timeline of originals that saved straight to Apple Photos.
What it does
- Groups, one-to-many “Drops” for events, Live Activities, a share extension and a widget.
- In our benchmark a 4K original arrived in 8.48s. WhatsApp took 31s to deliver a 720p re-encode.
Corrovia
The evidence layer for professional identity.
Hiring still runs on claims that are hard to verify: where someone worked, what they did, how senior they were. Corrovia turns those claims into evidence an employer can inspect.
- Role
- Founder, solo build
- Status
- MVP built and tested. Never publicly launched.
Why it exists
Employers spend hours checking fragments of a candidate’s history, or take it on trust. Generative AI has made professional credibility cheaper to fabricate, while privacy, AI governance and explainability requirements keep getting stricter. Corrovia addresses both.
What it does
- An employer enters the candidate’s claimed employment history. Corrovia identifies which claims need verifying and contacts the relevant professional references.
- Respondents are verified, then give structured, corroborating evidence instead of free-form feedback.
- The report shows, claim by claim, what could and could not be independently corroborated: identity, employment, dates, professional relationships, and any conflicting details such as a different job title.
- No opaque score and no automated hiring decision. Every result links back to the evidence behind it, and people stay in control.
How it’s built
- Compliance by design: GDPR and EU AI Act readiness built into the architecture, not added afterwards.
- Evidence provenance, data minimisation, configurable retention, access and deletion workflows, audit trails, role-based access, encryption and human oversight.
- Each check records verified links between people, companies, roles, employment periods and colleagues. Over time these form the Corrovia Graph, so future claims do not start from zero.
DocVerify
Answers from your documentation, with proof.
Answers questions from a set of documents, then checks every individual claim in the answer against those documents before showing it. It also flags where the docs themselves drift.
- Role
- Built solo
- Status
- Code is public on GitHub.
- Built with
- Python
- LangGraph
- DeBERTa NLI
- RAGAS
- Docker
Why it exists
An AI answer that sounds right is worse than no answer when nobody can check it. DocVerify shows its work claim by claim.
What it does
- Claim-level verification with term grounding, a DeBERTa NLI model and RAGAS scoring.
- Corrects documentation drift over time and writes an audit report.
How it’s built
- Deterministic checks run first; models run second.
- Packaged with Docker.
Graith CTS
A mobile transfer engine that finishes the job.
A patent-pending, cross-platform mobile transfer system delivered as an SDK. One written spec is implemented twice, in Swift and Kotlin, and both must pass the same shared test suite.
- Role
- Spec, architecture and both SDKs
- Status
- Patent pending. The SDK is not licensed publicly.
- Built with
- Swift
- Kotlin
- URLSession and Cronet
- BGContinuedProcessingTask
- WorkManager
Why it exists
Phones suspend background work as soon as you switch apps. Large uploads fail and restart. Graith keeps a transfer alive when the app sleeps, the network changes or the login expires.
What it does
- Three fallback tiers: HTTP/3 in the foreground, extended background time on iOS 26 and Android, and an OS-survivable fallback with a resume journal.
- Parallel multipart uploads of up to 10,000 parts, ranged downloads and adaptive concurrency.
- Recovers from an expired session mid-transfer without starting over.
How it’s built
- Built on BGContinuedProcessingTask, the background-processing API Apple introduced in iOS 26.
- Android builds with and without Google Play services, embedding Cronet on devices that lack it.
- Committed benchmark baselines gate every merge, so a slower build does not ship.
FullDrop
Original photos and videos, delivered by link.
Delivery for creative work. A photographer or videographer sends a whole shoot as one link: RAW files, photos and video at full quality, camera data kept. The client opens it free on any phone or computer, hearts favourites, comments and downloads everything or only their picks.
- Role
- Co-founder and CEO
- Status
- The website is live with a waitlist. The apps have not launched yet, so there is nothing to download.
- Built with
- Swift
- TypeScript
- Kotlin
- React Native
- Expo
- Supabase
- Cloudflare R2 and Workers
- RevenueCat
Why it exists
A shoot usually reaches the client as a zip file or a shared-drive folder: nothing to look at before it downloads, and no way to mark the frames they want. In FullDrop the link is where the client looks, chooses and downloads.
What it does
- RAW files from Canon, Nikon, Sony, Fujifilm, Olympus and Panasonic bodies go in unconverted, with camera data and location kept on every frame.
- The client needs no account to view or download in a browser. On a phone, the free app saves frames to Photos at full quality.
- Shared albums for weddings, trips and teams, and an export folder that keeps adding new files to the same link.
How it’s built
- Built on Graith CTS: multipart parallel uploads, ranged downloads, adaptive concurrency and HTTP/3 first, recovering its auth mid-transfer.
- Every file goes out through Cloudflare R2 and one Worker, which checks a scoped token that lives 10 minutes at most.
- 82 decision records and about 2,800 commits so far.
Winnow
The CRM cleaner.
Sorts a HubSpot contact export into keep, trash and review before it goes into Attio, so years of Gmail-sync clutter stay out of the new CRM.
- Role
- Designed and built
- Status
- Live on the web. Anyone can use it.
- Built with
- Python
- JavaScript
- HubSpot API
- Attio API
- Vercel
Why it exists
A CRM migration is the one chance to leave the junk behind, and nobody reads every contact by hand. Winnow does the first pass, flags the judgement calls, and never deletes anything from HubSpot.
What it does
- A rules pass first, then an optional AI pass for the ambiguous contacts.
- A keyboard-driven review screen for the contacts that need a person to decide.
- One-click Attio import that updates existing records instead of creating duplicates.
How it’s built
- Started as a Python CLI. The web version is a verified port that runs entirely in the browser, so contacts never leave the device.
- Works with your own AI key, or with no AI at all.
Kolleg
An HRIS for small companies that would rather not run one.
Time off, policies, onboarding, expenses and German payroll paperwork for a small team, in one place and without an enterprise price.
- Role
- Designed and built
- Status
- Not offered publicly.
- Built with
- TypeScript
- Next.js 15
- Prisma
- Postgres
- Auth.js
- Claude API
- Slack
- Google Calendar
Why it exists
Small companies either run HR on spreadsheets or pay enterprise prices for software they barely use. Kolleg covers what a small team needs and nothing else.
What it does
- Request leave in Slack in plain English or German. “ab Montag zwei Wochen Urlaub” works.
- Onboarding starts from the signed contract PDF: AI reads the title, pay, hours and start date.
- Policies with e-signatures and an audit trail, plus a separate tax-advisor portal with DATEV-style exports.
- Expense claims pre-filled from the invoice.
How it’s built
- Role-based access from employee to tax advisor.
- A shared “who’s away” Google Calendar kept in sync automatically.
- Self-hostable: each company runs its own copy.
Orchard
Your Apple devices, working as one.
A Swift-native, fault-tolerant compute runtime that splits work across a person’s own iPhone, iPad and Macs, and resumes it when one of them leaves.
- Role
- Research and runtime design
- Status
- Research stage. The repository stays private until the target demo runs end to end.
- Built with
- Swift
Why it exists
Many Apple users own several capable devices that sit idle while one of them does all the work. Orchard treats them as a small private cluster, using only public Apple APIs.
What it does
- Target demo: a pipeline over about 5,000 photos, run across an iPhone and two Macs, that survives one device leaving mid-run.
- Sits on ContinuityKit, a companion package for device discovery and trust.
How it’s built
- Swift 6 with strict concurrency, tested simulation-first.
- Network.framework, Wi-Fi Aware, Core ML, Metal and MLX. No private APIs.
- The first two feasibility experiments passed in August 2026.