Spark Email
- Company typePrivate
- Founded2007
- HeadquartersSan Francisco, United States
- Headcount11–50
- GTM typeB2B and B2C
- OfferingSoftware
What Spark Email does
Spark Email is a cross-platform email client developed by Spark Mail Limited, an Ireland-incorporated company (Dublin headquarters) that operates as part of the Readdle product family. The product is available on iOS, Android, Mac, Windows, Apple Watch, and Apple Vision Pro, and integrates with Gmail, Outlook/Exchange, iCloud, Yahoo, IMAP, and EWS accounts. Core functionality centers on a Smart Inbox that auto-categorizes messages into Personal, Priority, Notification, Newsletter, and Invitation folders, supplemented by Gatekeeper screening, Snooze, Send Later, Reminders, and Home Screen. The company has extended the product into adjacent workflows with Spark Calendar (Google, Exchange, iCloud sync with one-click Google Meet and Zoom links) and Meeting Notes (automatic video call transcription), and in May 2026 launched Spark CLI, a command-line interface that exposes inbox, contacts, calendar, and meeting notes to AI agents (Claude, Cursor, Codex, OpenClaw, Google Antigravity) via a free Read tier and a Pro-only Triage tier that supports autonomous actions such as archiving, labeling, and shared-inbox reassignment.
The technology stack combines client-side categorization and AI features with Google Cloud for data storage and encryption, and a local desktop data store that enables CLI-based agent access without round-tripping through Spark servers. The company ships generative AI features (Spark +AI for drafting, replying, translating, summarizing), an AI Assistant for natural-language inbox queries and semantic search, and integrations with Claude, GPT, and Gemini through Spark CLI, as well as local models via Ollama and LM Studio.
Spark operates a freemium, product-led growth model: the app is free to download with core email features, and revenue is generated through individual subscriptions (monthly or annual), per-seat team subscriptions billed monthly with pro-rated adjustments, and one-time AI add-on purchases for usage above the standard monthly quota. Distribution runs through Apple App Store, Google Play, Microsoft Store, Huawei AppGallery, Setapp, and direct website download, and the company markets through localized content (nine languages), an email newsletter, and earned coverage in TechCrunch, The Verge, Fast Company, Mashable, and Lifehacker. Customers are primarily individual professionals and small teams managing high email volumes, with emerging use cases in venture capital deal flow and SMB team inboxes. As of the input, the company has 11-50 employees, 19.5M cumulative downloads, 154K ratings averaging 4.8 stars, and Apple Editors' Choice recognition, with no disclosed funding rounds or revenue figures.
Spark Email firmographics
Firmographics- Name
- Spark Email
- Legal name
- Spark Mail Limited
- Website
- https://sparkmailapp.com
- Company type
- Private
- Founded year
- 2007
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Ownership category
- akta.pro rank
Spark Email industry classification
Industry- Product category
- Email Client Software
- NAICS
- Software Publishers (513210), Software Publishers (5132)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- AI Integration & Orchestration Platforms (Connectors, Workflow, iPaaS for AI) (HDAEANAI)
- akta.pro secondary industry
- Responsible AI, Security & Privacy Platforms (Safety, Guardrails, PII) (HDAEANAG)
Keywords
Where Spark Email is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Spark Email business model
Business model- GTM type
- B2B and B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Infrastructure, Marketing or Sales, Operations
Revenue model
- Subscription Revenue (Individual): Paid subscriptions for individual users accessing premium features. Billed monthly or annually with automatic renewal. Includes standard monthly AI usage quota.
- Subscription Revenue (Teams): Per-seat team subscriptions billed monthly based on active team member count. Pro-rated adjustments for team size changes.
- AI Add-on Purchases: One-time purchases for additional AI usage beyond standard monthly quota. Non-renewable and non-refundable. Unused portions carry over to next month.
- Setapp Subscription: Available through Setapp platform as part of their subscription bundle.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free tier with basic email features |
| Subscription | Monthly | Paid individual subscriptions with AI features |
| Subscription | Monthly | Team subscriptions with per-seat pricing |
Go-to-market motion1 record
Distribution channels6 records
Marketing channels4 records
Spark Email product offering
Product offeringCore offering
Spark Email is a cross-platform email client (iOS, Android, Mac, Windows, Apple Watch) that delivers AI-powered inbox management through Smart Inbox categorization, Priority email highlighting, Gatekeeper sender filtering, and an integrated AI writing assistant. The product supports Gmail, Outlook, Exchange, iCloud, Yahoo, and IMAP accounts, with team collaboration features for shared inboxes and a CLI tool that exposes inbox data to AI agents.
Product overview
Spark is a cross-platform email client (iOS, Android, Mac, Windows, Apple Watch) with AI-powered features built by Readdle. The core product offers Smart Inbox, AI Assistant, and Spark +AI for email management. Spark for Teams adds collaboration features. Spark CLI is a command-line add-on connecting AI agents to email data. Calendar and Meeting Notes extend beyond email for scheduling and transcription. The product supports IMAP, iCloud, Exchange, Outlook, Yahoo, and Google accounts with data stored securely via Google Cloud.
Differentiator
Problem solved
Functional benefit
Brands
- Spark +AI: AI-powered email writing assistant that helps craft perfect emails faster
- AI Assistant
- Spark CLI
- Spark Teams
- Spark Calendar
Products and services
- Spark Mail Cross-platform email client for iOS, Android, Mac, Windows, and Apple Watch offering Smart Inbox categorization, Priority email highlighting, Gatekeeper sender filtering, AI Assistant, and Spark +AI writing tools. Connects to Gmail, Outlook, Exchange, iCloud, Yahoo, and IMAP accounts.
- Spark for Teams
Quantifiable outcome
- 19.5 million downloads and 154K ratings with 4.8 star average
Companies that use Spark Email
Customer profileNamed customers3 records
Segments2 records
Ideal customer profiles2 records
Spark Email technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration9 records
AI capability9 records
Feature6 records
Spark Email partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core and minor.
- Claude (Anthropic)coreAI model integration through Spark CLI. Claude can access Spark inbox, contacts, calendar, and meeting notes for AI-powered email automation.
- CursorcoreAI code editor integration. Used by teams like ZAS Ventures for deal flow management and CRM-ready recap generation from email threads.
- Google (Gmail)coreGmail and Google Workspace integration. Spark connects to Gmail accounts and supports Google Calendar sync for cross-platform scheduling.
- Microsoft (Outlook/Exchange)coreFull Outlook and Exchange integration. Supports EWS protocol for enterprise email access. Calendar sync with Microsoft calendar services.
- Apple (iCloud)coreiCloud email integration. Available on Mac App Store and iOS App Store. Apple Watch companion app. Apple Vision Pro support.
- OpenAI (GPT)coreGPT model integration through Spark CLI for AI-powered email processing and automation.
- Google GeminicoreGemini AI model integration through Spark CLI for email automation capabilities.
- StripecorePayment processing for subscription billing through website and desktop app. Handles all team subscription payments and individual subscription purchases.
- Google CloudcoreData storage and encryption services. Secures user data storage with cloud infrastructure.
- SetappminorMac app subscription platform. Spark available through Setapp subscription service for Mac users.
Scale indicators4 records
Recent moves5 records
Expansion highlights5 records
Spark Email competitors and assessment
Company assessmentMarket position
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
Spark Email social profiles
Digital presenceSpark Email financial estimates
Financial estimateRevenue estimate
Valuation estimate
Spark Email leadership team
Management profileNumber of profiles
Profiles1 record
Spark Email funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Spark Email M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Spark Email
What does Spark Email do?
Spark Email is a cross-platform email client (iOS, Android, Mac, Windows, Apple Watch) that delivers AI-powered inbox management through Smart Inbox categorization, Priority email highlighting, Gatekeeper sender filtering, and an integrated AI writing assistant. The product supports Gmail, Outlook, Exchange, iCloud, Yahoo, and IMAP accounts, with team collaboration features for shared inboxes and a CLI tool that exposes inbox data to AI agents.
Is Spark Email a public or private company?
Spark Email is a private company. It is classified as corporate owned and is currently operating.
When was Spark Email founded?
Spark Email was founded in 2007. It employs 11 to 50 people.
Where is Spark Email based?
Spark Email is headquartered in San Francisco, United States, in the North America region.
How does Spark Email make money?
Four revenue lines are on record. Subscription Revenue (Individual) is the primary driver. The others are subscription Revenue (Teams), AI Add-on Purchases and setapp Subscription.
Does Spark Email have an API?
Yes. Spark CLI is a command-line interface that gives AI agents access to inbox, contacts, calendar, and meeting notes. It reads from Spark Desktop's local data storage and works with every major email provider. Two access tiers: Read (free for all users) and Triage (included in Spark Pro). Connects to Claude, Cursor, Codex, OpenClaw, Google Antigravity, and local models via Ollama or LM Studio. Semantic search runs on Spark's AI Assistant. Supports Gmail, Outlook, Exchange, iCloud, Yahoo, and any IMAP or EWS account. Developer documentation is at sparkmailapp.com/blog/introducing-spark-cli.
What industry is Spark Email in?
Spark Email's product category is Email Client Software. Its primary akta.pro industry code is HDAEANAI, AI Integration & Orchestration Platforms (Connectors, Workflow, iPaaS for AI), with a secondary code of HDAEANAG, Responsible AI, Security & Privacy Platforms (Safety, Guardrails, PII). Its NAICS code is 513210 and its SIC code is 7372.