mailin 2.0 is here · Bigger archives · Faster search · Resumable imports

Now live on the App Store · Built for iPhone, iPad & Mac

Email archive analysis,
powered by AI, on-device.

mailin parses Gmail Takeout, Outlook PST, .mbox, and .eml archives natively on iPhone, iPad, and Mac. All AI runs on-device — Apple Intelligence and NaturalLanguage. No network, no data collection, nothing ever leaves your device. Signed, verifiable exports.

⬇ Download on App Store ⚡ See on-device AI

Free tier available · No signup · No tracking · Universal Purchase

File formats

On-device AI engines

Apple platforms

Tracking SDKs

NEW IN VERSION 2.0

A foundation rewrite, now shipping — under the same UI.

mailin 2.0 keeps every v1 feature — the persona-driven UI, the full analysis suite, the on-device AI — and rebuilds the storage, ingest, and search layers underneath for archives that were never realistic on v1.

💧

Streaming ingest

Drop a 200 GB Gmail Takeout and walk away. v2 drains messages in batches of 200; peak memory stays flat regardless of file size.

♻️

Resumable from any crash

Per-file SHA-256 plus per-batch checkpoints. A crash 800 GB into an import resumes from the last batch — re-work capped at one batch of 200 messages.

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Year-sharded FTS5

Search splits across per-year SQLite shards with bm25 ranking. Time-bounded queries hit one shard; cross-archive queries fan out and merge.

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Keyset pagination

Jump to email #1,000,000 — it responds in a heartbeat. The old offset-scan freeze at depth is gone. Stable across timestamp ties.

🗺️

Larger PST / NSF

Memory-mapped readers. PST/OST up to 50 GB; NSF up to 64 GB. Multi-GB files no longer materialise in RAM.

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Same privacy posture

No telemetry, no analytics, no third-party SDKs. v2 stores data in the exact same on-device location as v1 — existing users get a free in-place upgrade.

Still offline by default. mailin v2 contains no IMAP, no SMTP, no live-mail code in its shipped binary. Your archive stays on your device. That's not a temporary posture — it's the product.

Two AI engines. Both on-device.

mailin runs every AI task locally on your device using Apple's own frameworks. There is no cloud, no API key, no network — your email never leaves your device.

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Apple Intelligence

Foundation Models on-device. Summaries, Q&A, reasoning. macOS 26+ / iOS 26+.

On-device · Free

📚

Apple NaturalLanguage

Sentiment, language detection, named entity recognition. Works on every Apple device.

On-device · Free

No network, by design.
The app has no network entitlement — it physically cannot connect to the internet. Verify it yourself with Little Snitch or the sandbox profile.

Nothing to leak.
No cloud, no API keys, no telemetry, no analytics. Your archive is processed entirely on your device and stays there.

Every output is tagged.
AIProvenance shows you exactly which engine produced each result. No black box, no surprises.

Graceful fallback chain.
If Apple Intelligence isn't available on your OS, Apple NaturalLanguage takes over — both fully on-device.

Open every major email archive format

No conversion. No middleman. Drop the file in — mailin parses it natively.

.mbox

Gmail Takeout, Thunderbird, Apple Mail

.pst

Outlook personal archive

.ost

Outlook offline cache

.eml

Standard RFC 822 message

.emlx

Apple Mail message

.msg

Outlook single message

.nsf

Lotus / HCL Notes archive

.zip

Bundled archives auto-extracted

Everything you need to explore an archive

Import, read, search, and understand years of email — right out of the box, free to start.

Open every archive format

Drag in a Gmail Takeout, an Outlook export, or a folder of messages. mailin parses it natively, threads the conversations, and shows a clean, readable inbox — no conversion, no upload.

MBOX, EML, EMLX, MSG, PST, OST, NSF, ZIP
Conversation threading via Message-ID / References
Filter by sender, date, folder, attachment
Full message view with headers and attachments

mailin inbox with an email archive loaded

Search like an analyst

A full-text index built entirely on-device, with the query power you'd expect from a real search engine — instant results across your whole archive.

BM25 relevance ranking
Boolean operators (AND, OR, NOT) + regex
Proximity search (NEAR/n)
Searches subject, headers, and body

Analytics dashboard

See the shape of your archive at a glance — who you talk to most, when your inbox is busiest, and what's taking up space. All interactive, all on-device.

Email volume timeline (sent vs. received)
Top contacts and communication pairs
Activity heatmap by day and hour
Attachment type & size breakdown

On-device AI, no cloud

Ask plain-language questions about your archive and get summaries, sentiment, and key topics — powered entirely by Apple's on-device AI. Nothing leaves your device.

AI Assistant — natural-language questions
Sentiment analysis on every email
Topic & keyword extraction
Smart filters and auto-tagging

Everything you need in one app

A comprehensive toolkit for legal, compliance, and investigative work — and a delightful daily driver for anyone with old email archives.

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AI Assistant

Ask plain-language questions about your archive. Powered entirely on-device by Apple Intelligence and Apple NaturalLanguage — no cloud, no API key.

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Analytics Dashboard

Email volume timeline, top contacts, activity heatmaps, attachment breakdowns, and relationship graphs — all interactive, all on-device.

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Smart Auto-Tagger

AI categorizes emails by topic, sender intent, and priority — with manual override and per-tier custom expert configurations.

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Anomaly Detection

Flag unusual sending patterns, suspicious timing, and IOC artifacts (IPs, URLs, file hashes) extracted automatically.

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Flexible Export

Export to EML, JSON, CSV, PDF, Bates-stamped PDF, or Concordance load files. Bulk attachment download. Signed for verification.

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Daily AI Digest

Generate a summary of important emails from any time range. Sentiment trends, urgent items, key threads — surfaced automatically.

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Offline Mode

Enable tamper-evident workflows: requires hash verification and enforces audit logging on every action. Everything stays on-device.

🎭

Persona Profiles

Pick your role — Analyst, Legal, IT Admin, Journalist, or Personal — and mailin tailors the interface to your workflow.

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SPF / DKIM / DMARC

Verify email authentication headers. Inspect routing chains, MIME trees, and attachment integrity in technical detail.

Who uses mailin?

Anyone who needs to make sense of an email archive — at any scale.

⚖️

Lawyers & Paralegals

Review email evidence, run privilege checks, build review batches, and produce Bates-stamped sets for disclosure.

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Analysts & Investigators

Hash-verified imports, tamper-evident audit logs, signed exports, and verifiable artifacts for high-integrity workflows.

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IT Admins

Inspect SPF/DKIM/DMARC headers, trace routing, find phishing patterns, and investigate compromised accounts.

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Journalists

Track sources, build story timelines, find connections across thousands of messages, and protect source confidentiality.

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Privacy-Conscious Individuals

Analyze your own email history with confidence. Nothing ever leaves your device unless you explicitly choose it.

Universal Apple-native

Buy once. Use everywhere. Your archive stays strictly on-device on each of your Apple devices.

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iPhone

iOS 17.6 and later

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iPad

iPadOS 17.6 and later

💻

Mac

macOS 14.6 and later

Universal Purchase

One purchase. All three platforms.

Subscribe or buy once, and mailin works across every Apple device signed into your Apple Account.

Under the hood

For the technically curious — exactly how mailin works.

🧩

Parsers, hand-written in Swift

MBOX, EML, EMLX, MSG, PST, OST, NSF — all parsed natively. RFC 822 + full MIME compliance: multipart, base64, quoted-printable, charset decoding. Streaming parser so 10GB+ Gmail Takeouts don't OOM.

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Search: BM25 + boolean + regex + proximity

Full-text index built locally. Operators: AND/OR/NOT, regex, NEAR/n. Indexes subject, headers, body. Threading via Message-ID / In-Reply-To / References.

🧠

On-device AI stack

Apple NaturalLanguage for sentiment, entities, language detection. Foundation Models (macOS 26+) for summaries and Q&A. All local — no cloud model, no API key, no network round-trip.

🔒

Privacy enforcement, not just claims

mailin ships with no network entitlement — the sandboxed binary cannot make a network call, period. No telemetry, no analytics, no data collection. Every AI output is tagged with the on-device engine that produced it (AIProvenance).

🛡️

Data integrity

SHA-256 hash on every email at import. HMAC-chained audit log where each entry signs the previous (tamper-evident). Ed25519-signed exports. Bates numbering with configurable prefix and padding.

Honest, transparent pricing

Start free with 500 emails. Upgrade when you need more. Lifetime tiers available — no recurring charge.

Free

Try mailin with no commitment

Email limit500

Price$0

Open any supported format
Basic search and filters
On-device NLP (sentiment, topics)
Try with sample data

Personal

For prosumers and power users

Monthly$4.99

Yearly$44.99 (save 25%)

Lifetime$99.99 one-time

Everything in Free
Unlimited bulk exports
Apple Intelligence AI Assistant
Daily AI digest, smart tagger
Advanced search & analytics
Knowledge graph & entity resolution

Professional

For legal, compliance, and enterprise teams

Monthly$9.99

Yearly$79.99 (save 33%)

Lifetime$249.99 one-time

Everything in Personal
Offline Mode + tamper-evident audit log
Bates numbering & Concordance export
Ed25519-signed exports
Predictive coding (TAR)
Redaction, GDPR report, legal holds

Ready to take control of your email archives?

Download mailin today on iPhone, iPad, or Mac. Free tier included. No signup required.

⬇ Download on App Store ✉ Contact Support

Direct link: https://apps.apple.com/app/mailin/id6767245397

Universal Purchase · iOS 17.6+ · macOS 14.6+ · Free tier always available

Email archive analysis,powered by AI, on-device.