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Research · head to head

Greenphire vs Paperpile

Greenphire logo

Greenphire

Research

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

From
On request
Rated
-
Full reviewWebsite
Paperpile logo

Paperpile

Research

Reference management essentials

From
$4.15/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Paperpile no monthly billing option; annual billing only
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Greenphire and Paperpile actually diverge.

Attributes where Greenphire and Paperpile differ
AttributeGreenphirePaperpile
Starting priceOn request$4.15/month
Pricing modelquotesubscription
PlatformsWeb, iOS, AndroidWeb

Identical on both: 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 Greenphire

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

Only in Paperpile

Nothing recorded that Greenphire does not also cover.

What people use each for

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

Greenphire

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

Paperpile

  • Organizing research papers and managing academic citationsnot Greenphire
  • Creating citations in multiple styles and BibTeX for writingnot Greenphire
  • Collaborating on research through shared reference librariesnot Greenphire
  • Integrating citations into Google Docs and Microsoft Wordnot Greenphire

Where each one falls short

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

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.

Paperpile

  • No monthly billing option; annual billing only
  • Regular plan lacks full-text PDF search and annotations
  • Safari and Firefox browser extensions currently in beta
  • Chrome signup initially required

Pricing, plan by plan

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

Paperpile

$4.15/month
  • Regular$4.15/month
    • Basic reference management
    • PDF storage and citation generation
    • Integrations with Word, Google Docs, and academic databases
  • Expert$5.75/month
    • All Regular features
    • Full-text PDF search
    • Notes and annotations

Which should you pick?

Choose Greenphire if

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

Choose Paperpile if

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

Paperpile review

Questions people ask

Is Greenphire or Paperpile better?
Neither clearly leads. Greenphire starts at On request and Paperpile at $4.15/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Greenphire or Paperpile?
Greenphire starts at On request and Paperpile at $4.15/month.
Does Greenphire or Paperpile run on more platforms?
Greenphire runs on Web, iOS, Android. Paperpile runs on Web.
What is Greenphire best used for?
Greenphire is most often used for a global phase iii trial paying stipends across many countries where participants cannot practically be reimbursed by sponsor accounts payable, a decentralised or hybrid trial where participants travel long distances and the sponsor funds flights and accommodation, a trial in a population where slow reimbursement drives dropout and same day payment materially helps retention, a sponsor that wants site payment milestones and participant payments handled by one vendor rather than two. Of those, a global phase iii trial paying stipends across many countries where participants cannot practically be reimbursed by sponsor accounts payable and a decentralised or hybrid trial where participants travel long distances and the sponsor funds flights and accommodation are not what Paperpile is typically brought in for.
What can Greenphire do that Paperpile cannot?
Greenphire covers ClinCard, Direct to bank payment, Expense reimbursement, Travel and logistics.

Answered from the vendors’ own pages

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.

Paperpile: How much does Paperpile cost?

Paperpile costs $4.15 per month for the Regular plan or $5.75 per month for the Expert plan, both billed annually.

Source
Greenphire: What is ClinCard?

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

Paperpile: Is there a free trial available for Paperpile?

Yes, Paperpile offers a 30-day free trial for both 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.

Paperpile: Does Paperpile offer academic or group discounts?

Yes, students, faculty, and researchers receive 50% off, and group discounts up to 20% off Expert plans are available when purchasing multiple seats.

Source
Greenphire: Can it pay participants outside the United States?

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

Paperpile: What billing options does Paperpile offer?

Paperpile accepts credit cards and PayPal, with additional payment options by location. Purchase orders are accepted for Enterprise customers.

Source
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