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Surveys · head to head

Formstack vs Invoca

Formstack logo

Formstack

Surveys

Form builder with document generation and e-signature

From
On request
Free plan
No
Full reviewWebsite
Invoca logo

Invoca

Marketing

Call tracking and conversation analytics that ties inbound phone calls back to paid marketing spend

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Each has a real cost: Formstack more expensive than form builders that only collect, which is the fair comparison for simple use; Invoca entry pricing commonly starts around 1,500 US dollars a month before call minutes, plus a setup and training fee, which prices out agencies and small businesses that only need attribution for a few hundred calls.
  • They diverge on capability: Formstack covers Form builder, Invoca covers Dynamic number insertion.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Formstack and Invoca actually diverge.

Attributes where Formstack and Invoca differ
AttributeFormstackInvoca
Pricing modelTiered monthly subscription published on the vendor site; HIPAA-capable plans priced separatelyquote
PlatformsWeb, CloudWeb
CategorySurveysMarketing

Identical on both: starting price (On request), free tier (No), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Formstack

  • Form builder
  • Document generation
  • E-signature
  • Workflow routing
  • Salesforce integration
  • Compliance features

Only in Invoca

  • Dynamic number insertion
  • Signal AI
  • Ad platform integration
  • Call transcription
  • PreSense
  • Call routing
  • Quality management
  • Compliance redaction

What people use each for

The jobs each tool is most often brought in to do.

Formstack

  • Processes where a submitted form must become a signed documentnot Invoca
  • Regulated intake needing HIPAA-capable handlingnot Invoca
  • Salesforce shops wanting forms and documents inside the CRMnot Invoca

Invoca

  • A multi-location healthcare group proving which paid search keywords produce booked appointments rather than just call volumenot Formstack
  • An insurance carrier feeding qualified call outcomes back into Google Ads so bidding optimises on written policies instead of raw callsnot Formstack
  • An automotive dealer group working out which regional campaigns generate service bookings versus tyre-kicker enquiriesnot Formstack
  • A home services franchisor allocating budget across franchisees by attributing revenue-producing calls to the campaigns that caused themnot Formstack

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Formstack

  • More expensive than form builders that only collect, which is the fair comparison for simple use
  • Document generation and signature sit in higher tiers, so the headline price is not the working price
  • The interface has accumulated features over a long life and shows it
  • Overkill where a form only needs to collect an answer

Invoca

  • Entry pricing commonly starts around 1,500 US dollars a month before call minutes, plus a setup and training fee, which prices out agencies and small businesses that only need attribution for a few hundred calls.
  • Telephony minutes and tracking numbers are metered separately from the platform fee, so a seasonal advertising spike produces an invoice nobody forecast.
  • Signal AI, PreSense and quality management are frequently sold as add-on modules rather than included, meaning the demo you were shown may cost noticeably more than the quote you were given.
  • Contracts are annual or multi-year with usage minimums and no month-to-month option, so a campaign strategy that shifts away from phone calls leaves you paying for capacity you no longer use.
  • The product is deep on inbound phone attribution and shallow elsewhere; if your buying journey also involves chat, forms and in-store visits, Invoca covers only one channel and you still need a separate attribution model for the rest.

Pricing, plan by plan

Formstack

On request

No published plan breakdown. See the Formstack review.

Invoca

On request
  • Pro$undefined/year
    • Around 6,000 annual local or toll-free numbers
    • 5 custom Signals
    • Dynamic number insertion
  • Enterprise$undefined/year
    • Around 12,000 annual numbers
    • 50 custom Signals
    • Advanced routing
  • Elite$undefined/year
    • Around 18,000 annual numbers
    • 100 custom Signals
    • Full analytics suite
  • Performance Professional$undefined/year
    • Pay-per-call network features
    • Publisher and affiliate call tracking
    • Payout management

Which should you pick?

Choose Formstack if

  • You need form builder.
  • You work on Web, Cloud.
  • You also want document generation.
Formstack review

Choose Invoca if

  • You need dynamic number insertion.
  • You also want signal ai.
Invoca review

Questions people ask

Is Formstack or Invoca better?
Neither clearly leads. Formstack starts at On request and Invoca at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Formstack or Invoca?
Formstack starts at On request and Invoca at On request.
Does Formstack or Invoca run on more platforms?
Formstack runs on Web, Cloud. Invoca runs on Web.
What is Formstack best used for?
Formstack is most often used for processes where a submitted form must become a signed document, regulated intake needing hipaa-capable handling, salesforce shops wanting forms and documents inside the crm. Of those, processes where a submitted form must become a signed document and regulated intake needing hipaa-capable handling are not what Invoca is typically brought in for.
What can Formstack do that Invoca cannot?
Formstack covers Form builder, Document generation, E-signature, Workflow routing. Invoca covers Dynamic number insertion, Signal AI, Ad platform integration, Call transcription.

Answered from the vendors’ own pages

Formstack: What does Formstack cost?

It publishes tiered monthly pricing; document generation and e-signature sit in higher tiers, and HIPAA-capable plans are priced separately.

Invoca: Does Invoca publish prices?

No. Every deal is quoted from call volume, number count and which modules you licence. Independent reports put the entry point near 1,500 US dollars a month plus minutes.

Formstack: What makes it different from a plain form builder?

It generates documents from submissions and collects signatures on them, which is the step that otherwise involves retyping form data into a template.

Invoca: Is this different from CallRail?

Yes, in ambition and price. Invoca targets enterprise attribution with automated outcome classification fed back to ad bidding; lighter call tracking tools stop at source attribution.

Formstack: Is it HIPAA compliant?

It offers HIPAA-capable plans for regulated data. That is a plan-level feature, not the default.

Invoca: Is it HIPAA compatible?

Invoca sells heavily into healthcare and offers redaction and compliance controls for regulated recordings; confirm the specific terms in your contract.

Invoca: Do we need a contact centre platform as well?

Yes. Invoca tracks and analyses calls, it does not run your contact centre.

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