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Nonprofits · head to head

Constant Contact vs OneCause

Constant Contact logo

Constant Contact

Nonprofits

Email marketing and event management

From
Free
Rated
-
Full reviewWebsite
OneCause logo

OneCause

Nonprofits

Event management and auction fundraising platform, now part of Bonterra

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Constant Contact has a free tier, so it costs nothing to try first.
  • Each has a real cost: Constant Contact core plan started at $9.99 per month and Plus plan at $45 per month, both scaling by contact list size rather than a flat rate (Internet Archive capture, 2022); OneCause no transparent pricing published; all plans require contacting sales at 888-475-5214 or online form for custom quotes
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Constant Contact and OneCause actually diverge.

Attributes where Constant Contact and OneCause differ
AttributeConstant ContactOneCause
Starting priceFreeOn request
Pricing modelsubscriptionquote
Free tierYesNo
PlatformsWeb, Mobile-responsiveWeb
Founded1995Unknown

Identical on both: 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 Constant Contact

  • Email marketing
  • Event management
  • Contact management
  • Automation
  • Analytics
  • Salesforce
  • Zapier
  • Google Analytics

Only in OneCause

Nothing recorded that Constant Contact does not also cover.

What people use each for

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

Constant Contact

  • Business operationsnot OneCause
  • Productivitynot OneCause
  • Automationnot OneCause

OneCause

  • Managing ticketing, sponsorships, and registration for fundraising eventsnot Constant Contact
  • Running silent and live auctions with mobile bidding capabilitiesnot Constant Contact
  • Coordinating peer-to-peer fundraising campaigns like walks and runsnot Constant Contact
  • Processing donations with gift matching and recurring contributionsnot Constant Contact

Where each one falls short

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

Constant Contact

  • Core plan started at $9.99 per month and Plus plan at $45 per month, both scaling by contact list size rather than a flat rate (Internet Archive capture, 2022)

OneCause

  • No transparent pricing published; all plans require contacting sales at 888-475-5214 or online form for custom quotes

Pricing, plan by plan

Constant Contact

Free
  • FreeFree
    • Basic email marketing
    • Contacts up to 100
  • Plus$45/month
    • Advanced features
    • Event management
    • Automation

OneCause

On request
  • Professional$undefined/mo
    • Foundational fundraising software
    • Ticketing, tables, sponsorships, auctions, donations
    • Suited for galas, luncheons, golf outings
  • Enterprise$undefined/mo
    • Large or multiple ticketed events
    • Event Ambassador Fundraising
    • Event Series
  • Nationals$undefined/mo
    • National organizations managing affiliate chapters
    • Organization Structure & Hierarchy
    • Event Templates

Which should you pick?

Choose Constant Contact if

  • You need email marketing.
  • You want to start without paying.
  • You work on Web, Mobile-responsive.
  • You also want event management.
Constant Contact review

Choose OneCause if

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

OneCause review

Questions people ask

Is Constant Contact or OneCause better?
Neither clearly leads. Constant Contact starts at Free and OneCause at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Constant Contact or OneCause?
Constant Contact has a free tier; the other does not. Paid plans start at Free for Constant Contact and On request for OneCause.
Does Constant Contact or OneCause run on more platforms?
Constant Contact runs on Web, Mobile-responsive. OneCause runs on Web.
Can I use Constant Contact for free?
Yes. Constant Contact has a free tier, so you can try it without paying. OneCause starts at On request.
What is Constant Contact best used for?
Constant Contact is most often used for business operations, productivity, automation. Of those, business operations and productivity are not what OneCause is typically brought in for.
What can Constant Contact do that OneCause cannot?
Constant Contact covers Email marketing, Event management, Contact management, Automation.

Answered from the vendors’ own pages

OneCause: How much does OneCause cost?

OneCause does not publish pricing online. All plans require a custom quote. Contact OneCause at 888-475-5214 or submit a request through their website for pricing information.

Source
OneCause: What pricing tiers does OneCause offer?

OneCause offers three main tiers: Professional (foundational fundraising software), Enterprise (large/multiple event management), and Nationals (national organizations with affiliate chapters). All require custom quotes.

Source
OneCause: Is there a Pay As You Go option?

OneCause indicates Pay As You Go availability is offered within the Professional plan, but specific costs require contact with sales.

Source
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Related pages

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