Quartz vs ThinnestAI: Features, Pricing & Which Is Better (2026)

A side-by-side comparison of Quartz and ThinnestAI — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.

Quartz

datarockets

Free

AI-native email client for Mac that sorts your inbox and drafts replies in your voice, running entirely on-device.

On-Device AI: Inbox sorting and reply drafting run locally on Apple Silicon, so email is never sent to external AI providers.
Importance-Based Triage: Auto-categorizes every message by importance you define and the system learns over time, surfacing what matters and collapsing FYI, Icebox, and Noise.
Voice-Matched Drafts: Learns your writing style, sender relationship, and thread context to draft replies that sound like you rather than a template.
Local Encryption: Mail is encrypted on your device with keys only you hold, and the company has no servers that can read it.
Gmail Integration: Connects to Gmail accounts and has been independently audited under Google's Cloud Application Security Assessment.

Inbox Overload: Professionals who get high message volume let Quartz triage by importance so they focus only on mail that needs attention.
Privacy-Sensitive Email: Users who handle confidential correspondence keep AI processing fully on-device instead of uploading mail to cloud AI services.
Faster Replies: Drafting routine responses in the user's own voice to cut time spent writing repetitive email.
Mac-First Workflow: Apple Silicon users who want a native, local-first email experience rather than a web client.

Freemium

BYOK voice AI platform from India for multilingual voice agents — 100+ languages, flat ₹1.5/min, INR billing, Twilio & SIP, no-code flow editor.

Flat Platform Pricing: A simple, transparent platform fee of ₹1.5/min for voice usage with INR billing and GST support to simplify cost forecasting for Indian customers.
Multilingual Coverage: Supports 100+ languages including every official Indian language, enabling agents to converse natively with diverse regional audiences.
No-Code Flow Editor: Visual, no-code editor to design, test, and iterate conversational flows and call logic without developer involvement for rapid deployment.
Native Telephony Integrations: Built-in integrations with Twilio and Vobiz SIP for direct PSTN dialing, inbound/outbound voice, and easy connection to existing telephony stacks.
BYOK & Provider Flexibility: Bring-Your-Own-Key support and compatibility with major managed model providers (including OpenAI) while offering ultra-fast native models on a free tier.
RBI-Residency & INR Billing: Platform designed with Indian data residency and regulatory needs in mind, offering INR invoicing and GST handling for compliance.
Support for 100+ languages including 22+ Indian languages
Bring-Your-Own-Key (BYOK) support for major model providers