How does Plunk pricing compare to Spreeflo?

Plunk charges $0.001 per email with unlimited contacts and a 1,000-email free tier, or nothing at all if you self-host, so a small sender pays a few dollars a month against Spreeflo’s $16 for 1,000 marketing contacts. The gap is what the subscription covers: browser push, forms, web analytics, custom objects, revenue attribution, AI personalization and managed deliverability, none of which Plunk provides.

Is Plunk production-safe?

It is actively developed with 5.2k GitHub stars, but it is maintained by one person, support is community-based rather than contractual, there are no dedicated IPs or SLAs, and independent deliverability data is essentially absent. Those are facts about the project rather than a verdict — plenty of teams run single-maintainer software knowingly — but self-hosting also makes sending reputation and uptime your responsibility.

Does Plunk have forms or browser push?

Neither — Plunk covers broadcasts, workflows, event triggers and segmentation, with no form builder and no push channel, so lead capture needs another tool and there is no form-submission trigger. Spreeflo includes unlimited forms with unlimited responses on its free plan, popup forms and browser push on Professional, all firing journey triggers directly.

Can an AI agent operate Plunk?

No — Plunk publishes no MCP server, so an external agent would need to work against its REST API directly with an integration you write and maintain. Spreeflo runs a hosted MCP server on every plan including Free, with roughly 67 tools spanning journeys, campaigns, segments, forms and templates, one API key and no OAuth, and server-side refusal of sends and publishes.

All Spreeflo comparisons

Spreeflo vs Plunk: Which is better? (2026)

14 Spreeflo wins · 7 tied · 5 Plunk wins

An open-source email platform combining transactional sending with broadcasts, visual workflows and segmentation, available self-hosted or as a cloud service at $0.001 per email.

Last verified: August 2026 27 points compared

See pricing

Should you choose Spreeflo or Plunk?

Plunk covers more than most infrastructure tools: broadcasts, visual workflows with delays and branching, event triggers and segmentation, all in one open-source project with 5.2k GitHub stars and active development. At $0.001 per email with unlimited contacts, the hosted service is the cheapest per-message option here, and self-hosting means the data is genuinely yours with EU hosting available.

What comes with that is single-maintainer risk. Support is community-based rather than contractual, there are no dedicated IPs or SLAs, independent deliverability data is essentially absent, integrations are few, and there is no AI story and no MCP server. If you self-host, sending reputation and uptime become your responsibility rather than someone else's.

Spreeflo shares the indie sensibility and the affordable pricing, and differs in what it takes on. Deliverability, uptime and reputation are Spreeflo's problem rather than yours; browser push, forms with unlimited responses, web analytics, custom objects, revenue attribution, per-recipient AI copy and a hosted MCP server are all included at $16 to $52 a month. Plunk stays cheaper per message and keeps the source code open.

What Spreeflo is

Spreeflo is an AI-powered marketing automation platform for founders and small teams — email, browser push notifications, forms and web analytics on one contact record, from $16/mo ($13 billed annually). Its AI writes per-recipient personalization at send time, an in-app AI assistant builds automations from plain language, and a hosted MCP server lets Claude, Claude Code or Cursor operate the whole workspace — while sends, publishes and deletes always require a person.

Founder-led businesses, one workspace. Sends, publishes and deletes always require a person — including when an AI agent is doing the building.

What Plunk is

Plunk provides transactional and marketing email in one open-source tool: broadcasts, visual workflows with delays, conditions and branching, event triggers, segmentation and analytics. The hosted service charges $0.001 per email with unlimited contacts and a free tier of 1,000 emails a month; self-hosting is free and requires you to supply your own sending credentials.

An independent open-source project started around 2023 by Dries Augustyns. AGPL-3.0 licensed.

Spreeflo vs Plunk: feature comparison

The same 27 points on every comparison we publish, including the ones Spreeflo loses. Rows marked Both are genuine ties; descriptive rows like the pricing model are shown but not scored.

14 Spreeflo wins 7 tied 5 Plunk wins

Feature and pricing comparison between Spreeflo and Plunk, verified August 2026.
Feature	Spreeflo	Plunk
Pricing
Starting paid price	Spreeflo: $16/mo — $13/mo billed annually (1,000 marketing contacts)	Plunk: $0.001 per email on the hosted service; self-hosting is free Wins
Free plan What it meaningfully includes	Spreeflo: ✓ Forms with unlimited responses, unlimited non-marketing contacts, full web analytics. No card.	Plunk: ✓ 1,000 emails/mo hosted, and unlimited if you self-host Wins
Pricing model	Spreeflo: Contact-based — billed on marketing contacts only	Plunk: Pay-per-email with unlimited contacts, or free self-hosted with your own sending credentials
Free storage for contacts you don’t market to Unsubscribed, archived and non-marketing contacts	Spreeflo: ✓ Unlimited, free	Plunk: ✓ Unlimited contacts — billing is per email Wins
Price at ~5,000 contacts	Spreeflo: $36/mo Starter · $52/mo Professional ($30 / $43 billed annually)	Plunk: A few dollars a month at typical volume, or free self-hosted Wins
Channels
Marketing email	Spreeflo: ✓ Starter	Plunk: ✓ Broadcasts included Both
Transactional email	Spreeflo: ✓ Starter — same plan, no separate product	Plunk: ✓ In the same tool as marketing Both
Browser push notifications	Spreeflo: ✓ Professional Wins	Plunk: ✕
Forms with unlimited responses on free	Spreeflo: ✓ Free plan Wins	Plunk: ✕ No form builder
Popup forms	Spreeflo: ✓ Professional Wins	Plunk: ✕
Web analytics dashboard	Spreeflo: ✓ Free plan Wins	Plunk: ~ Campaign analytics rather than a site analytics dashboard
AI / bot crawler traffic tracking	Spreeflo: ✓ AI-answer fetches, indexing and training crawlers reported separately Wins	Plunk: ✕
SMS	Spreeflo: ✕	Plunk: ✕ Both
Built-in CRM	Spreeflo: ✕	Plunk: ✕ Both
Automation
Visual journey builder	Spreeflo: ✓ Starter	Plunk: ✓ Visual workflows with delays, conditions and branching Both
Behavioral / custom-event triggers	Spreeflo: ✓ Professional	Plunk: ✓ Event-triggered workflows through the API Both
Form-submission trigger	Spreeflo: ✓ Starter Wins	Plunk: ✕ No native forms to trigger from
A/B testing	Spreeflo: ✓ Starter — random-split node in the builder Wins	Plunk: ✕
Full automation on the lowest paid tier	Spreeflo: ✓ Full builder on Starter, no step or workflow caps	Plunk: ✓ Nothing is gated — the whole product is open source Wins
AI & agents
AI copy written per recipient at send time	Spreeflo: ✓ AI variables, Professional Wins	Plunk: ✕ No AI features
In-app AI that builds automations from plain language	Spreeflo: ✓ Starter — stages proposals for approval Wins	Plunk: ✕
Official MCP server	Spreeflo: ✓ Every plan, including Free Wins	Plunk: ✕ No MCP server
AI agent can build automations over MCP Not just read contacts and stats	Spreeflo: ✓ Journeys, campaigns, segments, forms and email templates Wins	Plunk: ✕
Data
Nested AND/OR segmentation	Spreeflo: ✓ Starter — unlimited nesting Wins	Plunk: ~ Event and attribute segmentation without deep nesting
Custom events as triggers and segment conditions	Spreeflo: ✓ Tracking on Free · triggers and segment conditions on Professional	Plunk: ✓ Events are the core trigger primitive Both
Custom objects on the contact record Orders, subscriptions or accounts as related records, not just flat attributes	Spreeflo: ✓ Professional — orders, subscriptions and accounts linked to the contact Wins	Plunk: ✕
Multi-touch revenue attribution Credit split across touches, not only the last click	Spreeflo: ✓ Last-touch and linear (multi-touch) models, with a lookback window Wins	Plunk: ✕

Spreeflo prices shown are for 1,000 marketing contacts unless the row says otherwise. Plunk figures were last checked in August 2026 — pricing moves, so confirm on their site before deciding.

Where Spreeflo and Plunk differ

The two tools are built around different assumptions, so some of what Plunk covers has no Spreeflo equivalent. Here is exactly what that is, who it actually matters for, and what Spreeflo does in its place.

Open source and self-hostable

AGPL-3.0 licensed with the option to run it on your own infrastructure and own the data outright. Spreeflo is hosted only, and self-hosting is not offered.

The cheapest per-message pricing here

$0.001 per email with unlimited contacts, or free if you self-host and bring your own sending credentials. Spreeflo prices on marketing contacts and does not compete on cost per message.

Workflows and transactional in one small tool

Broadcasts, visual workflows and transactional sending without a second product. Spreeflo does the same but adds browser push, forms and analytics around it.

Where Spreeflo comes out ahead of Plunk

14 of 26 scored rows go Spreeflo’s way — for these reasons:

Plunk is cheaper, open source and covers more ground than most infrastructure tools, and those are real advantages. The wins here are about what a sustained product carries: browser push, forms with unlimited responses, popups, web analytics, bot-traffic reporting, custom objects, revenue attribution, A/B testing, per-recipient AI copy and a hosted MCP server — none of which Plunk offers at any price, and none of them gated. The larger difference is who carries deliverability and uptime. With Plunk, especially self-hosted, that is you, with community support and no SLA behind a single maintainer. With Spreeflo it is included in the $16.

Spreeflo is a marketing automation platform rather than a CRM, a page builder or an SMS gateway. The comparison above marks every row where that shows — nothing is hidden in a footnote.

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Sources

Plunk pricing and features last checked August 2026, from: