MKT AUTO
The AI agent moves into Slack, so operating Customer.io no longer means opening it.
Alternatives · marketing automation tools
Sulu alternatives
The best Sulu alternatives in marketing automation tools, ranked by Sparkpulse's velocity_score.
Updated Aug 20, 2026
Looking for the best alternatives to Sulu? Sparkpulse tracks and ranks 12 alternatives in marketing automation tools by shipping velocity — how frequently each ships meaningful updates, verified from official changelogs. For reference, Sulu shipped 0 meaningful updates in the last 30 days and carries a velocity score of 5.0 out of 10 in 2026. The alternatives below are ranked the same way, so you're comparing real release momentum, not marketing claims.
About Sulu
Sulu ships 2.6 and 3.0 in lockstep, and the 3.0 line still reads like a maintenance branch.
Sulu is a Symfony-based CMS for developer-built sites, and its release process is a synchronised pair: every 3.0.x patch ships within a minute of the matching 2.6.x patch, carrying largely the same pull requests. Six releases in five months — 3.0.8/2.6.25, 3.0.7/2.6.24, 3.0.6/2.6.23 — are almost entirely fixes, editor upgrades and framework compatibility work. A security advisory was patched across both branches in March.
Velocity 5.0 · Last update 18d ago
Top 12 alternatives to Sulu
Ranked by recent ship velocity. Tap any card for the full editorial breakdown, or pivot to a head-to-head.
MKT AUTO
The reporting layer arrives, and it counts what agents did and what they cost.
MKT AUTO
Mailtrap is assembling a full email operations platform, one category step at a time
MKT AUTO
Customer.io spent the summer pushing messaging off the screen and into location, time, and the lock screen
MKT AUTO
AWeber keeps moving email marketing out of its own console and into whatever tool you already have open.
MKT AUTO
Craft 6's alphas keep converting the plugin API, one removal at a time
MKT AUTO
Flodesk just moved its analytics out of the dashboard and into Claude and ChatGPT.
MKT AUTO
Formidable widens MCP compatibility and locks down signature files
MKT AUTO
Formaloo is turning its form builder into something you describe rather than configure.
MKT AUTO
An SEO content mill where the product itself never appears
MKT AUTO
Ecommerce blocks keep landing while open tracking gets a regulatory escape hatch
MKT AUTO
Buttondown documents its events API, opening dashboard analytics to anyone who wants to pull them
Sulu vs alternatives — shipping velocity at a glance
Velocity score (0–10) and meaningful releases shipped in the last 30 days, from official changelogs. Higher = shipping faster.
| Product | Velocity | Sparks · 30d | Focus areas | Latest release |
|---|---|---|---|---|
| Sulu (baseline) | 5.0 | 0 | symfony-cmsdual-branch-releasesckeditor | — |
| Customer.io | 8.8 | 3 | ai-agentsslack-distributionllm-actions | Use Customer.io AI in Slack |
| Gumloop | 7.5 | 2 | agentsmcpenterprise-governance | Meet Gumball (Beta) |
| Mailtrap | 7.5 | 2 | email-apideliverabilityinbound-email | Automated Domain Reputation Monitoring |
| Customer.io | 7.5 | 1 | geofencingpush-notificationsworkflow-triggers | Geofences: message people when they enter or exit a location |
| AWeber | 6.3 | 1 | email-marketingai-builderslanding-pages | Run Your Email Marketing From Claude With AWeber’s New Claude Connector |
| Craft CMS | 6.3 | 1 | cmslaravelplugin-api | Craft 6 alpha 14 breaks plugin providers and lifecycle hooks |
| Flodesk | 6.3 | 1 | email-marketingai-agentsmcp | Claude Connector and ChatGPT Plugin |
| Formidable Forms | 6.3 | 1 | wordpressformsmcp | Forms API v2.0 |
| Formaloo | 6.3 | 0 | form-builderai-authoringno-code-logic | Magic Logic generates form rules from a plain-English description |
| Moosend | 5.0 | 0 | email-marketingseo-contentcontent-marketing | — |
| GetResponse | 5.0 | 0 | email-marketingecommerceproduct-recommendations | — |
| Buttondown | 5.0 | 0 | newslettersemail-marketingapi | — |
The 12 best Sulu alternatives, in depth
1. Customer.io · velocity 8.8
The AI agent moves into Slack, so operating Customer.io no longer means opening it.
Over the last 30 days Customer.io shipped 3 meaningful updates vs Sulu's 0, most recently “Use Customer.io AI in Slack”. Its velocity score of 8.8/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Customer.io focuses on ai agents, slack distribution and llm actions.
Over the last 30 days Customer.io has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
Full Customer.io trajectory → · Compare Sulu vs Customer.io →
2. Gumloop · velocity 7.5
The reporting layer arrives, and it counts what agents did and what they cost.
Over the last 30 days Gumloop shipped 2 meaningful updates vs Sulu's 0, most recently “Meet Gumball (Beta)”. Its velocity score of 7.5/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Gumloop focuses on agents, mcp and enterprise governance.
Over the last 30 days Gumloop has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
3. Mailtrap · velocity 7.5
Mailtrap is assembling a full email operations platform, one category step at a time.
Over the last 30 days Mailtrap shipped 2 meaningful updates vs Sulu's 0, most recently “Automated Domain Reputation Monitoring”. Its velocity score of 7.5/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Mailtrap focuses on email api, deliverability and inbound email.
Over the last 30 days Mailtrap has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
4. Customer.io · velocity 7.5
Customer.io spent the summer pushing messaging off the screen and into location, time, and the lock screen.
Over the last 30 days Customer.io shipped 1 meaningful update vs Sulu's 0, most recently “Geofences: message people when they enter or exit a location”. Its velocity score of 7.5/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Customer.io focuses on geofencing, push notifications and workflow triggers.
Over the last 30 days Customer.io has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
Full Customer.io trajectory → · Compare Sulu vs Customer.io →
5. AWeber · velocity 6.3
AWeber keeps moving email marketing out of its own console and into whatever tool you already have open.
Over the last 30 days AWeber shipped 1 meaningful update vs Sulu's 0, most recently “Run Your Email Marketing From Claude With AWeber’s New Claude Connector”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, AWeber focuses on email marketing, ai builders and landing pages.
Over the last 30 days AWeber has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
6. Craft CMS · velocity 6.3
Craft 6's alphas keep converting the plugin API, one removal at a time.
Over the last 30 days Craft CMS shipped 1 meaningful update vs Sulu's 0, most recently “Craft 6 alpha 14 breaks plugin providers and lifecycle hooks”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Craft CMS focuses on cms, laravel and plugin api.
Over the last 30 days Craft CMS has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
7. Flodesk · velocity 6.3
Flodesk just moved its analytics out of the dashboard and into Claude and ChatGPT.
Over the last 30 days Flodesk shipped 1 meaningful update vs Sulu's 0, most recently “Claude Connector and ChatGPT Plugin”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Flodesk focuses on email marketing, ai agents and mcp.
Over the last 30 days Flodesk has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
8. Formidable Forms · velocity 6.3
Formidable widens MCP compatibility and locks down signature files.
Over the last 30 days Formidable Forms shipped 1 meaningful update vs Sulu's 0, most recently “Forms API v2.0”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Formidable Forms focuses on wordpress, forms and mcp.
Over the last 30 days Formidable Forms has been shipping faster than Sulu — a point in its favour if release momentum matters to you.
Full Formidable Forms trajectory → · Compare Sulu vs Formidable Forms →
9. Formaloo · velocity 6.3
Formaloo is turning its form builder into something you describe rather than configure.
Its velocity score of 6.3/10 reflects longer-term release cadence; its most recent meaningful update was “Magic Logic generates form rules from a plain-English description”.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Formaloo focuses on form builder, ai authoring and no code logic.
Formaloo and Sulu have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
10. Moosend · velocity 5.0
An SEO content mill where the product itself never appears.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Moosend focuses on email marketing, seo content and content marketing.
Moosend and Sulu have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
11. GetResponse · velocity 5.0
Ecommerce blocks keep landing while open tracking gets a regulatory escape hatch.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, GetResponse focuses on email marketing, ecommerce and product recommendations.
GetResponse and Sulu have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full GetResponse trajectory → · Compare Sulu vs GetResponse →
12. Buttondown · velocity 5.0
Buttondown documents its events API, opening dashboard analytics to anyone who wants to pull them.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Sulu leans on symfony cms, dual branch releases and ckeditor, Buttondown focuses on newsletters, email marketing and api.
Buttondown and Sulu have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Frequently asked questions
What are the best alternatives to Sulu?
The top Sulu alternatives we currently track in marketing automation tools are Customer.io, Gumloop, Mailtrap, Customer.io, AWeber, ranked by recent ship velocity.
How is this list of Sulu alternatives ranked?
Alternatives are ranked by Sparkpulse's velocity_score — release cadence + 30-day spark count + sector-relative ship rate.
Can I compare Sulu directly with one of these alternatives?
Yes — every card has a "Compare with Sulu" link to a side-by-side /compare page.