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Comparison · Mkt Auto
Formidable Forms vs Sulu
A side-by-side editorial comparison of Formidable Forms and Sulu — release velocity, themes, recent moves, and the top alternatives to consider.
Formidable Forms vs Sulu: at a glance
What is Formidable Forms?
Formidable widens MCP compatibility and locks down signature files
Forms API v2.0.1 makes the Formidable MCP server tolerate the older MCP adapter versions bundled in other plugins such as WooCommerce and Rank Math, instead of refusing with an incompatibility message. Digital Signature Forms v3.2 adds form-level protection for signature files, a role requirement to access them, and permanent deletion of old signatures when an entry is deleted.
What is 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.
Formidable Forms vs Sulu: editorial side-by-side
Formidable Forms
6.3MKT AUTO
Formidable widens MCP compatibility and locks down signature files
◆ Current state
Forms API v2.0.1 makes the Formidable MCP server tolerate the older MCP adapter versions bundled in other plugins such as WooCommerce and Rank Math, instead of refusing with an incompatibility message. Digital Signature Forms v3.2 adds form-level protection for signature files, a role requirement to access them, and permanent deletion of old signatures when an entry is deleted.
◆ Where it's heading
Two threads are running in parallel across the add-on family. One is agent access, opened by the Forms API v2.0 MCP adapter and the WordPress Abilities API, now being made to coexist with the other plugins already shipping MCP adapters on the same site. The other is a sustained security pass, visible in signature file handling, tokenized CSV downloads, and the Stripe and core-plugin hardening earlier in the window.
◆ Prediction
Adapter-version collisions between plugins are likely to recur as more WordPress plugins ship MCP servers, so expect further compatibility patches rather than new API surface in the near term.
Sulu
5.0MKT AUTO
Sulu ships 2.6 and 3.0 in lockstep, and the 3.0 line still reads like a maintenance branch.
◆ Current state
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.
◆ Where it's heading
Three threads run through the pairs. Editor upkeep is constant, with CKEditor moving to 47 LTS and then 48 and the fallout — table widgets, webpack font builds — fixed release by release. Framework compatibility is the second: Request->get calls replaced for Symfony 8, PHPUnit 13 and PHPStan kept green on lowest dependencies. The third and most interesting is data-model cleanup on the 3.0 side, where tags migrated from names to IDs behind a newly added DoctrineMigrationsBundle, with smart-content filters reworked to match. What is not visible is any capability that exists on 3.0 and not on 2.6 — a major version that is not yet behaving like one.
◆ Prediction
Expect the paired-release rhythm to continue with more Symfony 8 preparation and CKEditor 48 fallout. The open question is when 3.0 starts receiving work that is not upmerged from 2.6; until then the major version number is not buying users anything.
Alternatives to Formidable Forms and Sulu
Other Mkt Auto products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Formidable Forms or Sulu.
GetResponse
Ecommerce blocks keep landing while open tracking gets a regulatory escape hatch
Buttondown
Buttondown documents its events API, opening dashboard analytics to anyone who wants to pull them
Gumloop
The reporting layer arrives, and it counts what agents did and what they cost.
Customer.io
The AI agent moves into Slack, so operating Customer.io no longer means opening it.
n8n
Four release lines in parallel, and nearly every patch lands on the agent builder.
See all Formidable Forms alternatives → · See all Sulu alternatives →
Recent activity from Formidable Forms and Sulu
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoFormidable FormsFormidable MCP server works alongside older adapters from other plugins
- 3d agoFormidable FormsSignature files gain form-level protection and role-gated access
- 8d agoFormidable FormsEntry search reaches repeater and embedded form data
- 9d agoFormidable FormsForms API v2.0 ⚡
- 16d agoFormidable FormsSignature deletion validation tightened after a Wordfence report
- 28d agoFormidable FormsExport shortcode works when the view export link is disabled
- 1mo agoSuluSulu 3.0.8 validates selection filter params at build time
- 1mo agoSuluSulu 2.6.25 adds a redirect after SSO login
- 2mo agoSuluSulu 3.0.7 fixes smart-content filtering and speeds up indexing
- 2mo agoSuluSulu 2.6.24 upgrades CKEditor to version 48
- 3mo agoSuluSulu 3.0.6 migrates tag names to IDs with Doctrine migrations
- 3mo agoSuluSulu 2.6.23 moves to CKEditor 47 LTS and preps Symfony 8
Frequently asked questions
What is the difference between Formidable Forms and Sulu?
They serve adjacent needs but don't currently overlap on shipped themes. Formidable Forms is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Formidable Forms better than Sulu?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Formidable Forms is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Mkt Auto products to evaluate alongside.
What are the best alternatives to Formidable Forms?
Top Formidable Forms alternatives in Mkt Auto are ranked by recent ship velocity. Browse the "Formidable Forms alternatives" section above for the current picks, or visit /alternatives/formidable-forms for the full list with editorial commentary on each.
What are the best alternatives to Sulu?
Top Sulu alternatives in Mkt Auto are ranked by recent ship velocity. Browse the "Sulu alternatives" section above for the current picks, or visit /alternatives/sulu for the full list with editorial commentary on each.