Can I open-source Spark Premium?
KINDA · partial or early alternativesKinda. Stalwart and Listmonk cover the core of Spark Premium, but they're early or partial — expect gaps like mobile and desktop apps, push, team drafts, sync, AI, and provider compatibility and mail hosting and deliverability.
People still pay for Spark Premium because an email client can be rebuilt; operating a trusted mail service with excellent deliverability cannot. The recurring cost buys IMAP quirks, OAuth, MIME, threading, search, attachments, offline sync, notifications, secure storage, and provider changes, not just the visible interface.
xmobile and desktop apps, push, team drafts, sync, AI, and provider compatibility
xmail hosting and deliverability
xpush on every platform
xadvanced team collaboration
xprovider-specific AI and search
These projects already replace it, free.
LListmonkHigh-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backendopen source↗SStalwartModern all-in-one mail server in Rust with JMAP, IMAP, and SMTP plus built-in spam filtering.open source↗What each one is, in full: Listmonk · Stalwart
no votes, no pay-to-list · just what's real
Spark Premium pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| free | $0/user | $0/user | Unlimited email accounts; Smart Inbox, smart notifications, essential productivity, calendar; no AI Meeting Notes quota disclosed for Free. |
| plus | $10/user | $8.25/user | 40 AI Meeting Notes; advanced email productivity, Spark +AI/AI Assistant, custom templates, essential team collaboration. |
| pro | $20/user | $16.58/user | Unlimited AI Meeting Notes; Read Statuses, advanced team collaboration, HubSpot integration, Spark CLI; Workflows/Auto Labels/Drafts listed as coming soon. |
| enterprise | custom | — | Custom enterprise terms; numeric caps not published. |
free tier$0; unlimited email accounts; Smart Inbox, smart notifications, essential email productivity and calendar; no numeric send/storage cap disclosed.
billingmonthly + annual (Plus $99/yr; Pro $199/yr)
hidden costsLegacy Premium is not the current public upsell; AI Meeting Notes are capped at 40 on Plus and unlimited only on Pro.
verified 2026-08-10 · source ↗
Can I open-source Spark Premium?
Kinda. Listmonk covers the core of Spark Premium, but there are real gaps: mobile and desktop apps, push, team drafts, sync, AI, and provider compatibility, mail hosting and deliverability. Read the honest list above before committing.
How much does Spark Premium cost?
Spark Premium costs about $10/month (Plus, checked 2026-08-10), which is $120 per year.
What do I lose by replacing Spark Premium?
Honestly: mobile and desktop apps, push, team drafts, sync, AI, and provider compatibility; mail hosting and deliverability; push on every platform; advanced team collaboration; provider-specific AI and search. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Spark Premium?
Yes: Listmonk (High-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backend) Stalwart (Modern all-in-one mail server in Rust with JMAP, IMAP, and SMTP plus built-in spam filtering.)