n8n
n8n 3.0 is out, shipped the same morning as 2.46 after weeks of migration-report groundwork.
Comparison · Mkt Auto
Gumloop vs Litmus
A side-by-side editorial comparison of Gumloop and Litmus — release velocity, themes, recent moves, and the top alternatives to consider.
Gumloop vs Litmus: at a glance
| Feature | Gumloop | Litmus |
|---|---|---|
| Sector | Mkt Auto | Mkt Auto |
| Velocity score | 7.5 | 5.0 |
| Sparks · 30d | 1 | 0 |
| Top themes | ai agents, artifacts, agent evaluations, workflow automation | email-testing, deliverability, personalization, email-analytics |
| Last editorial update | 2d ago | 2mo ago |
| Website | — | Visit → |
What is Gumloop?
Gumloop 13.1 lets live artifacts drive agents through the SDK and opens outputs in Office.
Gumloop ships a numbered release every few days. In October it gave agents a real browser (12.0), agent-owned secrets, team sharing and embeddable AI artifacts, then 13.0 rebuilt the agent harness for longer work and added organization-wide evaluations. 13.1 lets scripts in live artifacts message, create and list agents, artifacts, skills and teams through the Gumloop SDK, opens agent-made files in Google Workspace or Microsoft Office, and lets agents on a call run long tasks in the background while they keep talking.
What is Litmus?
The blog feed says nothing; Litmus's real changelog sits undated in a separate scrape.
Two sources sit under this product and they do not agree. The dated feed is a deliverability and lifecycle education blog — footers, rebrands, preference centres, birthday sends, holiday prep — and announces no product change; one entry even carries the rebrand article's excerpt instead of its own, a scrape defect. The undated rows are the actual Litmus release archive: Email Guardian, Integrated Insights, Litmus Personalize, Litmus Assistant, and two dozen smaller Builder, Proof, and testing releases.
Gumloop vs Litmus: editorial side-by-side
Gumloop
7.5MKT AUTO
Gumloop 13.1 lets live artifacts drive agents through the SDK and opens outputs in Office.
◆ Current state
Gumloop ships a numbered release every few days. In October it gave agents a real browser (12.0), agent-owned secrets, team sharing and embeddable AI artifacts, then 13.0 rebuilt the agent harness for longer work and added organization-wide evaluations. 13.1 lets scripts in live artifacts message, create and list agents, artifacts, skills and teams through the Gumloop SDK, opens agent-made files in Google Workspace or Microsoft Office, and lets agents on a call run long tasks in the background while they keep talking.
◆ Where it's heading
The product is moving from building agents to operating them at org scale, and artifacts are turning into small apps that can control agents themselves. Model access is also being made easier to manage, with families, deprecation dates and fallback visibility.
◆ Prediction
Expect more of the SDK exposed to artifacts and further evaluation and Insights controls at the usual weekly pace; the entries don't show pricing changes.
Litmus
5.0MKT AUTO
The blog feed says nothing; Litmus's real changelog sits undated in a separate scrape.
◆ Current state
Two sources sit under this product and they do not agree. The dated feed is a deliverability and lifecycle education blog — footers, rebrands, preference centres, birthday sends, holiday prep — and announces no product change; one entry even carries the rebrand article's excerpt instead of its own, a scrape defect. The undated rows are the actual Litmus release archive: Email Guardian, Integrated Insights, Litmus Personalize, Litmus Assistant, and two dozen smaller Builder, Proof, and testing releases.
◆ Where it's heading
Read from the release archive rather than the blog, Litmus has moved outward from pre-send rendering QA in three directions: analytics that join ESP performance data to its own engagement data, open-time personalization acquired with Kickdynamic, and generative drafting inside the editor. The in-ESP testing integrations — Klaviyo, Adobe Journey Optimizer, Intilery — are the same capability extended market by market. Apple's Mail Privacy Protection forced a run of measurement-integrity work that the later reporting features depend on.
◆ Prediction
Because the archive carries no dates, ordering and recency are unreadable and no confident call on the next release is available from this feed. What can be said is that the analytics and personalization lines each accumulated follow-on releases after their originating launch, so further work on those two surfaces is the pattern the entries support.
Alternatives to Gumloop and Litmus
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 Gumloop or Litmus.
Activepieces
Activepieces backports October's Node.js security update to five release lines.
Buttondown
Buttondown closes an API send loophole and blocks confirmation-email floods in its daily fixes.
Formidable Forms
Formidable Forms 7.0.1 makes the builder preview reflect more Pro settings as they change.
Pimcore
Pimcore 2026.3.3.1 tightens the Twig sandbox again, two days after 2026.3.3.
SendPortal
SendPortal resurfaces with a v4 patch release, its first tag since 2020.
See all Gumloop alternatives → · See all Litmus alternatives →
Recent activity from Gumloop and Litmus
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoGumloopGumloop 13.1: artifacts drive agents via SDK, open in Office
- 6d agoGumloopGumloop 13.0: revamped agent harness and org-wide evaluations ⚡
- 10d agoGumloopGumloop 12.5: artifacts call AI models and embed on any site
- 14d agoGumloopGumloop 12.4: agent-built MCPs, multi-account apps, team sharing
- 16d agoGumloopGemini 4 Argon and Muse Wonder
- 20d agoGumloopAgent-Owned Secrets
- 2mo agoLitmusThe Email Footer: Small Space, Big Responsibility
- 2mo agoLitmusHow to Protect Your Email Program During a Rebrand: A Practitioner’s Guide
- 3mo agoLitmusWe Want Your Email Preferences: The New Approach to Opting In
- 3mo agoLitmusHappy Birthday, Now Buy Yourself a Present! The Potential of Birthday Emails
- 3mo agoLitmusTaking the Mystery Out of Email Deliverability
- 3mo agoLitmusYour Holiday Emails Start Now: A Summer Deliverability Prep Guide
Frequently asked questions
What is the difference between Gumloop and Litmus?
They serve adjacent needs but don't currently overlap on shipped themes. Gumloop is currently shipping more aggressively (velocity 7.5 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 Gumloop better than Litmus?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Gumloop is currently shipping more aggressively (velocity 7.5 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 Gumloop?
Top Gumloop alternatives in Mkt Auto are ranked by recent ship velocity. Browse the "Gumloop alternatives" section above for the current picks, or visit /alternatives/gumloop for the full list with editorial commentary on each.
What are the best alternatives to Litmus?
Top Litmus alternatives in Mkt Auto are ranked by recent ship velocity. Browse the "Litmus alternatives" section above for the current picks, or visit /alternatives/litmus for the full list with editorial commentary on each.