Can I open-source Spike?
KINDA · partial or early alternativesKinda. Stalwart and Listmonk cover the core of Spike, but they're early or partial — expect gaps like sender reputation, deliverability, and suppression handling and provider-grade deliverability.
Spike: Email is infrastructure. Customers pay to avoid lost messages, broken auth, spam problems, and the reputational cost of a flaky inbox.
xsender reputation, deliverability, and suppression handling
xprovider-grade deliverability
xpush reliability across devices
xteam routing and shared inbox rules
xabuse response and security operations
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
Spike pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| teamspace starter | $0/workspace | $0/workspace | Up to 3 members, 1 teamspace, free email address, 60 days search, 15 GB storage/member, 15 MB file uploads, 10 AI queries. |
| teamspace team | — | $4/user | 100 GB storage/member, 100 MB file uploads, unlimited search history, shared inbox; annual plan includes custom domain free for 1 year. |
| teamspace business | — | $8/user | 1 TB storage/member, 500 MB file uploads, unlimited search history, 50 video participants; SAML listed as coming soon. |
| email app free | $0/user | $0/user | 1 email address, 1 GB storage, 30 MB file uploads, 60 days search, 1:1 calls, 10 AI queries. |
| email app pro | — | $6/user | Up to 3 email addresses, 5 participants, 5 GB storage, 100 MB file uploads, unlimited search. |
| email app ultimate | — | $12/user | Unlimited email addresses, 10 participants, 20 GB storage, 1 GB file uploads. |
free tierTeamspace Starter: 3 members, 1 teamspace, 60-day search, 15 GB/member, 15 MB uploads, 10 AI queries; Email Free: 1 email address, 1 GB storage, 30 MB uploads, 60-day search, 10 AI queries.
billingannual public pricing only; subscriptions auto-renew until canceled
hidden costsMonthly USD prices were not exposed on the official page; Teamspace storage/file limits differ from Email App limits.
verified 2026-08-10 · source ↗
Can I open-source Spike?
Kinda. Listmonk covers the core of Spike, but there are real gaps: sender reputation, deliverability, and suppression handling, provider-grade deliverability. Read the honest list above before committing.
How much does Spike cost?
Spike's pricing is usage-based or varies by plan · The official pricing URL is recorded, but a stable current amount was not safely recoverable in this pass. Do not publish a number until rechecked..
What do I lose by replacing Spike?
Honestly: sender reputation, deliverability, and suppression handling; provider-grade deliverability; push reliability across devices; team routing and shared inbox rules; abuse response and security operations. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Spike?
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.)