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Nonprofits · head to head

Donorbox vs Fluxx

Donorbox logo

Donorbox

Nonprofits

Online fundraising platform for nonprofits

From
Free
Rated
-
Full reviewWebsite
Fluxx logo

Fluxx

Nonprofits

Configurable grants management for foundations that run complex, multi-stage funding programmes

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Donorbox has a free tier, so it costs nothing to try first.
  • Each has a real cost: Donorbox standard plan charges 2.95-3.95% platform fee per donation on top of payment processor fees (2.2-2.49% + card processing); Fluxx configuration flexibility means the system does very little until someone configures it, and foundations without a dedicated systems administrator end up paying the vendor or a partner for every change.
  • They diverge on capability: Donorbox covers Custom donation forms, Fluxx covers Configurable data model.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Donorbox and Fluxx actually diverge.

Attributes where Donorbox and Fluxx differ
AttributeDonorboxFluxx
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
Founded2016Unknown

Identical on both: platforms (Web), user rating (Not yet rated), category (Nonprofits).

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 Donorbox

  • Custom donation forms
  • Peer-to-peer fundraising
  • Payment processing
  • Donor management
  • Stripe
  • PayPal
  • Mailchimp
  • Zapier

Only in Fluxx

  • Configurable data model
  • Card-based interface
  • Multi-programme workflows
  • Board and committee review
  • Payment scheduling
  • Applicant portal

What people use each for

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

Donorbox

  • Small to mid-sized nonprofits needing affordable donation processing in 96+ countriesnot Fluxx
  • Organisations seeking integrated event ticketing and peer-to-peer fundraisingnot Fluxx
  • Multi-channel giving strategies including text-to-give and membership programmesnot Fluxx

Fluxx

  • A foundation running six distinct funding programmes that each need their own application form, review panel and payment schedulenot Donorbox
  • A regranting intermediary administering funds for multiple donors who each require separate reportingnot Donorbox
  • A public agency distributing grant funds with statutory eligibility rules that must be enforced before an application can be submittednot Donorbox
  • A funder moving off spreadsheets and email after grant volume made manual board packet preparation unworkablenot Donorbox

Where each one falls short

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

Donorbox

  • Standard plan charges 2.95-3.95% platform fee per donation on top of payment processor fees (2.2-2.49% + card processing)
  • Premium plan pricing requires contacting sales, not displayed publicly
  • Pro plan limited to growing organisations; larger nonprofits must upgrade to Premium with custom pricing

Fluxx

  • Configuration flexibility means the system does very little until someone configures it, and foundations without a dedicated systems administrator end up paying the vendor or a partner for every change.
  • Implementation commonly runs four to eight months and is priced separately from the subscription, so first-year cost is far above the annual licence figure.
  • No pricing is published and quotes scale with assets under management, which means two foundations making the same number of grants can be quoted very differently.
  • The card-based interface is unfamiliar to new users and reviewer adoption suffers without training, which matters because trustees use it a few times a year and forget between meetings.
  • Reporting is capable but the report builder is technical, and many foundations end up exporting to a spreadsheet or a BI tool for board-ready output.

Pricing, plan by plan

Donorbox

Free
  • StandardFree
    • Unlimited donation forms and pages
    • Basic reporting
    • 2.95-3.95% transaction fees
  • Pro$150/month
    • Advanced customizations
    • Crypto and stock donations
    • AI assistant included

Fluxx

On request
  • Fluxx Grantmaker$undefined/year
    • Configurable grantmaking workflows
    • Applicant portal and reviewer access
    • Priced by assets under management and grant volume
  • Fluxx Grantseeker$undefined/year
    • Free portal for applicants submitting to Fluxx funders
    • Tracks submissions and requirements across funders

Which should you pick?

Choose Donorbox if

  • You need custom donation forms.
  • You want to start without paying.
  • You also want peer-to-peer fundraising.
Donorbox review

Choose Fluxx if

  • You need configurable data model.
  • You also want card-based interface.
Fluxx review

Questions people ask

Is Donorbox or Fluxx better?
Neither clearly leads. Donorbox starts at Free and Fluxx at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Donorbox or Fluxx?
Donorbox has a free tier; the other does not. Paid plans start at Free for Donorbox and On request for Fluxx.
Does Donorbox or Fluxx run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Donorbox for free?
Yes. Donorbox has a free tier, so you can try it without paying. Fluxx starts at On request.
What is Donorbox best used for?
Donorbox is most often used for small to mid-sized nonprofits needing affordable donation processing in 96+ countries, organisations seeking integrated event ticketing and peer-to-peer fundraising, multi-channel giving strategies including text-to-give and membership programmes. Of those, small to mid-sized nonprofits needing affordable donation processing in 96+ countries and organisations seeking integrated event ticketing and peer-to-peer fundraising are not what Fluxx is typically brought in for.
What can Donorbox do that Fluxx cannot?
Donorbox covers Custom donation forms, Peer-to-peer fundraising, Payment processing, Donor management. Fluxx covers Configurable data model, Card-based interface, Multi-programme workflows, Board and committee review.

Answered from the vendors’ own pages

Donorbox: How much does Donorbox cost?

Donorbox Standard is free with 2.95-3.95% transaction fees. Pro is $150/month with 1.75-2% transaction fees, advanced customizations, and AI assistance. Premium requires a custom quote.

Source
Fluxx: Is Fluxx Grantseeker really free?

Yes, for applicants. It is the submission portal, and funders pay for Grantmaker.

Donorbox: Is Donorbox free?

Yes, Donorbox Standard is free with unlimited donation forms and basic reporting, though transaction fees of 2.95-3.95% apply.

Source
Fluxx: How is Fluxx priced?

By quote, scaling with assets under management and grant volume. Implementation is a separate professional services fee.

Donorbox: What are Donorbox's transaction fees by plan?

Standard plan charges 2.95-3.95% per transaction. Pro charges 1.75-2%. Premium charges 1.6-2%. All plans allow donors to cover processing fees.

Source
Fluxx: Can we configure Fluxx ourselves?

Yes, that is the point of it. But it requires a trained internal administrator; foundations that do not appoint one become dependent on paid services.

Fluxx: How long does implementation take?

Typically four to eight months for a multi-programme funder, driven mostly by how long the foundation takes to agree its own process.

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