Open-source acknowledgements

Last reviewed: 30 April 2026

Ostler ships with a number of third-party open-source components. Each entry below links to its upstream repository and to the canonical licence text we redistribute. The legally-binding NOTICE files are bundled inside the installed product (per Apache 2.0 §4(d) compliance) and surfaced via Settings → About → Acknowledgements in the iOS Companion and lifeline --licenses on the Mac Hub.

This page is a quick public index. If you spot a missing entry, an out-of-date version, or a licence we've classified incorrectly, please tell us at legal@ostler.ai.

Permissive (MIT / BSD / Apache-2.0)

The majority of Ostler's stack. Attribution required, no copyleft obligations.

Python – Mac Hub services

aiofiles ≥23.2.0 repo · Apache-2.0
aiokafka ≥0.10.0 repo · Apache-2.0
aiolimiter ≥1.1.0 repo · MIT
aiosqlite ≥0.19.0 repo · MIT
anthropic ≥0.40.0 repo · MIT
bcrypt ≥4.0.0,<5 repo · Apache-2.0
beautifulsoup4 ≥4.12.0 repo · MIT
click ≥8.1.0 repo · BSD-3-Clause
cryptography ≥46.0.1,<47 repo · Apache-2.0 OR BSD-3-Clause
diskcache ≥5.6.0 repo · Apache-2.0
fastapi ≥0.109.0 repo · MIT
fastapi-users ≥13.0.0 repo · MIT
gunicorn ≥21.0.0 repo · MIT
httpx ≥0.25.0 repo · BSD-3-Clause
lxml ≥5.0.0 repo · BSD-3-Clause
mcp (Model Context Protocol) ≥1.0.0 repo · MIT
mkdocs latest repo · BSD-2-Clause
mkdocs-material latest repo · MIT
msoffcrypto-tool ≥5.0.0 repo · MIT
openpyxl ≥3.1.0 repo · MIT
passlib ≥1.7.4 repo · BSD-3-Clause
phonenumbers ≥8.13.0 repo · Apache-2.0
pydantic ≥2.5.0 repo · MIT
pydantic-settings ≥2.1.0 repo · MIT
python-jose ≥3.3.0 repo · MIT
python-multipart ≥0.0.6 repo · Apache-2.0
PyYAML ≥6.0 repo · MIT
qdrant-client ≥1.15,<2 repo · Apache-2.0
rdflib ≥7.0.0 repo · BSD-3-Clause
redis (Python client) ≥5.0.0 repo · MIT
requests ≥2.31.0 repo · Apache-2.0
rich ≥13.7.0 repo · MIT
sentence-transformers ≥2.2.0 repo · Apache-2.0
sqlalchemy ≥2.0.0 repo · MIT
torch ≥2.1.0 repo · BSD-3-Clause
uvicorn ≥0.27.0 repo · BSD-3-Clause
vobject ≥0.9.6 repo · Apache-2.0

Swift – iOS Companion & macOS RemoteCapture

FluidAudio 0.14.1 repo · Apache-2.0
llama.swift 2.8931.0 repo · MIT
realm-core 14.14.0 repo · Apache-2.0
realm-swift 10.54.6 repo · Apache-2.0
swift-argument-parser 1.7.1 repo · Apache-2.0
swift-asn1 1.6.0–1.7.0 repo · Apache-2.0
swift-collections 1.4.1 repo · Apache-2.0
swift-crypto 4.3.1–4.5.0 repo · Apache-2.0
swift-jinja 2.3.5 repo · Apache-2.0
swift-transformers 1.1.9 repo · Apache-2.0
WhisperKit 0.18.0 repo · MIT
yyjson 0.12.0 repo · MIT

Bundled runtime services

Ollama latest repo · MIT
Oxigraph latest repo · Apache-2.0 OR MIT
Qdrant latest repo · Apache-2.0
Valkey (LF fork of Redis 7.2) latest repo · BSD-3-Clause

Local model weights

Models are lazy-downloaded on first use; you'll be informed before any download.

nomic-embed-text v1.5 repo · Apache-2.0
OpenAI Privacy Filter latest repo · Apache-2.0
OpenAI Whisper (medium-v3-turbo) v3 repo · MIT
Qwen 3.5 9B 9B Q4 repo · Apache-2.0
Qwen 3.5 35B-A3B 35B MoE repo · Apache-2.0

If you swap in an alternative local model (Llama, Gemma, or others) via Ollama, that model carries its own upstream licence which we cannot reproduce here on your behalf. You're responsible for accepting the chosen model's terms before use.

Mozilla Public License 2.0

File-level copyleft. Modifications to the licensed files must be published under MPL-2.0; combining with a larger work under another licence is permitted.

orjson ≥3.9.0 repo · Apache-2.0 OR MIT (with MPL-2.0 components)

Other open licences (Zlib)

Permissive in effect, but distinct from the MIT/BSD/Apache family.

pysqlcipher3 ≥1.2.0,<2 repo · Zlib
SQLCipher (C library, Homebrew dep) latest repo · BSD-3-Clause

Copyleft (LGPL / GPL)

Ostler does not bundle any GPL or LGPL code into its distributed binaries. Where any optional tooling falls under copyleft (for example, developer-only utilities), it is invoked as a separate process or fetched at install time from the user's own package manager (Homebrew, pip), not redistributed by us.

Custom / proprietary

Linked at runtime from the user's operating system. Not bundled or redistributed by us. No attribution required; listed for transparency.

Apple SDK frameworks – ActivityKit, AVFoundation, BackgroundTasks, Contacts, CoreLocation, EventKit, HealthKit, MusicKit, Network, ScreenCaptureKit, Security, SwiftUI, UIKit, WatchKit, WidgetKit. Governed by the Apple Developer Program License Agreement.

Why this matters

Open source is the reason a small team can ship a product like this. Attribution is the trade. The version-controlled source-of-truth for the legally-binding NOTICE files lives inside the installed product. Mistakes in this list are ours, not the upstream projects'.

Contact

Missed something? Questions about a specific licence, missing attribution, or compliance: legal@ostler.ai or security@creativemachines.ai.