Plumeform vs Formstack

Plumeform vs Formstack.

Formstack connects forms with documents, signatures and Salesforce workflows. The listed entry plan is $99 a month after a 14-day trial, with no ongoing free plan. Prices below were checked in September 2026.

Pick Formstack if

You live in Salesforce. Formstack's native Salesforce forms and document generation are the reason it exists.
You need documents and e-signatures produced from form data, as one flow.
You need HIPAA-eligible forms with a BAA.
Approvals and routing matter more than what the answers mean.

Pick Plumeform if

You want to try it properly. Plumeform's free plan is not a countdown: 100 responses a month, 21 question types, for as long as you like.
Your limit should be responses, not responses per form. Formstack Forms allows 1,000 per form on a $99 plan.
You need research controls. Attention checks, timers, randomization, screening and quotas are not what a workflow product sells.
One builder seat is not enough. Formstack Forms includes one; Plumeform Pro includes five.

Side by side

Feature	Formstack	Plumeform
Free plan	None, 14-day trial	100 responses / month, no clock
Entry price	$99 / mo ($83 annual)	$0, then $15 / mo
Submissions	1,000 per form	10,000 / month on Pro
Builder seats included	1	5
Attention checks and quality flags	No	Yes (attention checks on Pro)
Quotas and screening	No	Yes (Pro)
Documents and e-signature	Yes	No
Salesforce-native	Yes	No

This comparison uses pricing reviewed in July and September 2026. Plans can change; check Formstack's current pricing and ours.

Prices and limits

$996

a year before you have collected anything

$83 / mo billed yearly there; the free plan here is free

builder seat on Formstack Forms

five are included in Plumeform Pro

days on their trial

our free plan has no end date

Common questions.

Is Formstack a survey tool?

You can build surveys in Formstack. Its document, approval and Salesforce workflows are reasons to choose it. Compare the response-analysis and research features if those are your main requirements.

Does Plumeform integrate with Salesforce?

Not natively. On Pro there is a webhook on every submission and a read API, which is how you would wire it, but there is no packaged Salesforce app.

Can I really use the free plan indefinitely?

Yes. 100 completed responses a month, 21 of the 30 question types, unlimited surveys. No card, and nothing expires.

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100 responses a month on Free, with no credit card. Build and preview every question type, logic rule, template and look; publishing a Pro feature needs Pro, and AI, import, image uploads, integrations and studies need Pro to use.