ProtonMail
End-to-end encrypted email service from the Proton team.
Alternatives · 2026
Alternatives to Spark
Smart email client with team inbox and shared drafts.
5 hand-curated alternatives from MintedSaaS's directory. See the Spark listing →
Spark is a priority inbox and team email client for macOS and iOS, built around shared drafts and collaborative features. It centers collaboration between team members, offering features like shared inboxes, scheduled sends, and read receipts aimed at small teams that treat email as a coordination tool. Spark sits in the productivity email category—distinct from general-purpose email clients by its focus on group workflows rather than individual message management.
People reach for Spark when they want to reduce email noise through smart filtering and when multiple team members need to draft and respond to messages together. It's commonly used by marketing departments, customer support teams, and small agencies that need better signal-to-noise ratios and want to avoid duplicated or contradictory replies. The typical buyer has already outgrown standard Gmail or Outlook and wants something designed for team coordination without the overhead of a full help desk platform.
What we offer that competes
Tutanota
Open-source encrypted email and calendar service.
Hey
Opinionated email service from the makers of Basecamp.
Superhuman
Premium keyboard-driven email client built for speed.
What to look for
- Whether the platform supports shared inboxes so multiple people can claim responsibility for a single message.
- Whether the client offers a native desktop application for your operating system or requires web access.
- Whether draft collaboration is built-in or whether team members must take turns editing messages.
- Whether the platform enforces encryption at rest or uses standard TLS encryption in transit only.
- Whether integrations with Slack, Zapier, or other tools are documented and officially supported.
- Whether mobile apps include offline reading or require active internet access to view messages.
FAQ
What are the best alternatives to Spark?
The strongest alternatives depend on what you're prioritizing. ProtonMail and Tutanota focus on encryption and privacy over collaboration. Missive and Hey emphasize team workflows and conversation threading. Superhuman targets speed and keyboard navigation for individual power users.
Are there free alternatives to Spark?
Hey and Missive both offer free trials, but neither has a permanent free tier. Tutanota and ProtonMail do offer free email accounts with limited storage, though they're not specifically designed for team collaboration like Spark.
How do I choose a team email client?
Start by identifying whether you need shared inboxes, draft collaboration, or just better inbox filtering. Then check whether the platform supports your operating system (iOS, Android, web, desktop) and whether it integrates with the tools your team already uses.
What platforms do Spark alternatives support?
ProtonMail and Tutanota work on web, iOS, and Android but lack native Mac desktop apps. Missive, Hey, and Superhuman all offer web and mobile access; Superhuman is macOS and web only, while Missive and Hey have broader platform coverage.
Do these email clients integrate with Slack or other tools?
Missive has built-in Slack integration for managing conversations across channels. ProtonMail, Tutanota, and Hey don't offer native Slack integrations. Superhuman focuses on email efficiency rather than third-party tool connectivity.
Which email alternatives offer end-to-end encryption?
ProtonMail and Tutanota both use end-to-end encryption by default for all emails. Spark, Missive, Hey, and Superhuman rely on standard TLS encryption during transit but don't encrypt messages at rest on their servers.
Can I use these platforms if I'm the only user?
Yes, all five alternatives work as individual email clients. Spark, Missive, and Hey show their value more with teams, but none require group setup. ProtonMail and Tutanota are designed for individual users first, collaboration second.
Are there industry-specific email clients besides Spark?
Superhuman is purpose-built for sales professionals and executives who want email speed. Missive leans toward customer support and marketing teams. ProtonMail and Tutanota appeal to privacy-conscious users across all industries.