Software · head to head
OneCause vs Constant Contact
OneCause
Software
Event management and auction fundraising platform, now part of Bonterra
- From
- On request
- Rated
- -
The short version
- Only Constant Contact has a free tier, so it costs nothing to try first.
- Each has a real cost: OneCause pricing page names three tiers (Professional, Enterprise, Nationals) but publishes no dollar figures, requiring a request for the pay-as-you-go rate and a custom quote for Enterprise and Nationals, as of August 2026; 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)
Where they differ
Only the attributes on which OneCause and Constant Contact actually diverge.
| Attribute | OneCause | Constant Contact |
|---|---|---|
| Starting price | On request | Free |
| Pricing model | usage-based | subscription |
| Free tier | No | Yes |
| Platforms | Web | Web, Mobile-responsive |
| Founded | Unknown | 1995 |
Identical on both: user rating (Not yet rated), category (Unknown).
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 OneCause
Nothing recorded that Constant Contact does not also cover.
Only in Constant Contact
- Email marketing
- Event management
- Contact management
- Automation
- Analytics
- Salesforce
- Zapier
- Google Analytics
What people use each for
The jobs each tool is most often brought in to do.
OneCause
No use cases recorded yet. See the OneCause review.
Constant Contact
- Business operationsnot OneCause
- Productivitynot OneCause
- Automationnot OneCause
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
OneCause
- Pricing page names three tiers (Professional, Enterprise, Nationals) but publishes no dollar figures, requiring a request for the pay-as-you-go rate and a custom quote for Enterprise and Nationals, as of August 2026
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)
Pricing, plan by plan
OneCause
On requestNo published plan breakdown. See the OneCause review.
Constant Contact
Free- FreeFree
- Basic email marketing
- Contacts up to 100
- Plus$45/month
- Advanced features
- Event management
- Automation
Which should you pick?
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.
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.
Questions people ask
- Is OneCause or Constant Contact better?
- Neither clearly leads. OneCause starts at On request and Constant Contact at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, OneCause or Constant Contact?
- Constant Contact has a free tier; the other does not. Paid plans start at On request for OneCause and Free for Constant Contact.
- Does OneCause or Constant Contact run on more platforms?
- OneCause runs on Web. Constant Contact runs on Web, Mobile-responsive.
- 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 can OneCause do that Constant Contact cannot?
- Constant Contact covers Email marketing, Event management, Contact management, Automation.