Softwr

Research · head to head

Attest vs Greenphire

Attest logo

Attest

Research

Straightforward pricing for predictable research costs

From
On request
Rated
-
Full reviewWebsite
Greenphire logo

Greenphire

Research

Clinical trial participant payments, reimbursement and travel, now part of Suvoda

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Attest pricing is metered by credits, where one credit equals one survey question answered by one person, rather than a flat per seat rate; Greenphire the standalone greenphire.com site now redirects to Suvoda and the brands have been integrated, so buyers are contracting with a randomisation and supply vendor and should expect cross selling rather than an independent payments specialist.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Attest and Greenphire actually diverge.

Attributes where Attest and Greenphire differ
AttributeAttestGreenphire
Pricing modelsubscriptionquote
PlatformsWebWeb, iOS, Android

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

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 Attest

Nothing recorded that Greenphire does not also cover.

Only in Greenphire

  • ClinCard
  • Direct to bank payment
  • Expense reimbursement
  • Travel and logistics
  • Site payments
  • Budgeting and benchmarking
  • Tax handling

What people use each for

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

Attest

  • Testing product concepts with global audiencesnot Greenphire
  • Monitoring brand health across campaignsnot Greenphire
  • Validating creative concepts before launchnot Greenphire
  • Researching market trends in 70 languagesnot Greenphire

Greenphire

  • A global Phase III trial paying stipends across many countries where participants cannot practically be reimbursed by sponsor accounts payablenot Attest
  • A decentralised or hybrid trial where participants travel long distances and the sponsor funds flights and accommodationnot Attest
  • A trial in a population where slow reimbursement drives dropout and same day payment materially helps retentionnot Attest
  • A sponsor that wants site payment milestones and participant payments handled by one vendor rather than twonot Attest

Where each one falls short

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

Attest

  • Pricing is metered by credits, where one credit equals one survey question answered by one person, rather than a flat per seat rate
  • The Basic tier caps usage at 50,000 credits; going beyond it requires upgrading to Standard (100,000), Elite (200,000) or a custom plan above 400,000
  • Additional credits purchased mid year cost 10 percent more per credit than the plan rate

Greenphire

  • The standalone greenphire.com site now redirects to Suvoda and the brands have been integrated, so buyers are contracting with a randomisation and supply vendor and should expect cross selling rather than an independent payments specialist.
  • Nothing is published on price, and the typical shape of a platform fee plus per participant and per transaction charges means the cost of a trial is not knowable until enrolment is known.
  • Payment method availability varies sharply by country, so a global protocol may end up with card payments in some regions and slow manual processes in others, which undermines the retention argument that justified the purchase.
  • Sites bear the administrative work of enrolling participants and triggering payments but are not the buyer, so adoption depends on the sponsor mandating it and site resistance is a real implementation risk.
  • Participant payments create tax reporting obligations that differ per jurisdiction, and the tooling helps but does not remove sponsor liability, so legal and finance review is required in every country the trial runs in.

Pricing, plan by plan

Attest

On request
  • Basic$undefined/mo
    • Up to 50,000 credits
  • Standard$undefined/mo
    • Up to 100,000 credits
  • Elite$undefined/mo
    • Up to 200,000 credits
  • Custom$undefined/mo
    • Over 400,000+ credits

Greenphire

On request
  • Greenphire Patient Payments$undefined/year
    • Priced per study through a sales process
    • Typically a platform fee plus per participant and per transaction charges
    • Funding of the payment float is separate from the software fee

Which should you pick?

Choose Attest if

Nothing in the data separates Attest from Greenphire on the points above - pick on price and on how each one feels to use.

Attest review

Choose Greenphire if

  • You need clincard.
  • You work on Web, iOS, Android.
  • You also want direct to bank payment.
Greenphire review

Questions people ask

Is Attest or Greenphire better?
Neither clearly leads. Attest starts at On request and Greenphire at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Attest or Greenphire?
Attest starts at On request and Greenphire at On request.
Does Attest or Greenphire run on more platforms?
Attest runs on Web. Greenphire runs on Web, iOS, Android.
What is Attest best used for?
Attest is most often used for testing product concepts with global audiences, monitoring brand health across campaigns, validating creative concepts before launch, researching market trends in 70 languages. Of those, testing product concepts with global audiences and monitoring brand health across campaigns are not what Greenphire is typically brought in for.
What can Attest do that Greenphire cannot?
Greenphire covers ClinCard, Direct to bank payment, Expense reimbursement, Travel and logistics.

Answered from the vendors’ own pages

Attest: How does Attest's credit system work?

Attest uses a credit-based pricing system where one credit equals one survey answer from one respondent. For example, a 10-question survey completed by 500 people uses 5,000 credits. Only respondents who meet survey criteria consume credits from the qualifying question.

Source
Greenphire: Is Greenphire still sold?

Yes, as Greenphire Patient Payments on the Suvoda platform. The independent website and social presence have been consolidated into Suvoda.

Attest: What plans does Attest offer?

Attest offers four subscription plans: Basic (up to 50,000 credits), Standard (up to 100,000 credits), Elite (up to 200,000 credits), and Custom (over 400,000+ credits). All plans include unlimited user seats, designated research expert, customer success team support, and access to 150+ million consumers across 59 countries in 70+ languages.

Source
Greenphire: What is ClinCard?

The reloadable debit card Greenphire issues to participants. Greenphire Patient Payments was formerly known as ClinCard.

Attest: Can I purchase additional credits on Attest?

Yes. Additional credits are available as add-ons throughout the year. Add-on credits cost 10% more than the per-credit rate in annual plans.

Source
Greenphire: Does it publish pricing?

No. Pricing is per study and quoted through sales, and funding the payments themselves is separate from the software fee.

Greenphire: Can it pay participants outside the United States?

Yes, in more than thirty currencies, but the available payment method depends on the country.

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