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Nonprofits · head to head

Constant Contact vs Tendenci

Constant Contact logo

Constant Contact

Nonprofits

Email marketing and event management

From
Free
Rated
-
Full reviewWebsite
Tendenci logo

Tendenci

Nonprofits

Open-source association management system for nonprofits

From
Free
Rated
-
Full reviewWebsite

The short version

  • 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); Tendenci self-hosting is a real operational commitment, and organisations without technical capacity should not treat the free licence as a free system
  • They diverge on capability: Constant Contact covers Email marketing, Tendenci covers Open-source licence.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Constant Contact and Tendenci differ
AttributeConstant ContactTendenci
Pricing modelsubscriptionOpen source, with paid hosting available
PlatformsWeb, Mobile-responsiveWeb, Linux, Self-hosted, Cloud
Founded1995Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Tendenci

  • Open-source licence
  • Membership management
  • Events and registration
  • Donations
  • Content-managed website
  • Email

What people use each for

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

Constant Contact

  • Business operationsnot Tendenci
  • Productivitynot Tendenci
  • Automationnot Tendenci

Tendenci

  • Nonprofits whose boards require member and donor data to stay under their own controlnot Constant Contact
  • Organisations with data residency obligations a hosted platform cannot satisfynot Constant Contact
  • Groups with technical capacity wanting to avoid per-member subscription costs at scalenot Constant Contact
  • Associations needing to customise workflows beyond what a proprietary platform allowsnot 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)

Tendenci

  • Self-hosting is a real operational commitment, and organisations without technical capacity should not treat the free licence as a free system
  • The community is small compared with mainstream open-source projects, so answers are harder to find and contributors are few
  • The interface is dated against the commercial association platforms and this is the most common user complaint
  • Fewer integrations than commercial competitors, and building them is a development task rather than a configuration one
  • Feature depth in events and continuing education is behind the specialist commercial systems

Pricing, plan by plan

Constant Contact

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

Tendenci

Free
  • Self-hostedFree
    • Full source code
    • No per-member licence
    • Community support
  • Managed hosting$undefined/month
    • Hosted and maintained
    • Updates applied
    • Support included

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 Tendenci if

  • You need open-source licence.
  • You want to start without paying.
  • You work on Web, Linux, Self-hosted, Cloud.
  • You also want membership management.
Tendenci review

Questions people ask

Is Constant Contact or Tendenci better?
Neither clearly leads. Constant Contact starts at Free and Tendenci at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Constant Contact or Tendenci?
Constant Contact starts at Free and Tendenci at Free.
Does Constant Contact or Tendenci run on more platforms?
Constant Contact runs on Web, Mobile-responsive. Tendenci runs on Web, Linux, Self-hosted, Cloud.
Can I use Constant Contact for free?
Both have a free tier, so you can try either at no cost before committing.
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 Tendenci is typically brought in for.
What can Constant Contact do that Tendenci cannot?
Constant Contact covers Email marketing, Event management, Contact management, Automation. Tendenci covers Open-source licence, Membership management, Events and registration, Donations.

Answered from the vendors’ own pages

Tendenci: Is Tendenci really free?

The software is, under an open-source licence with no per-member fee. Running it is not: hosting, updates, backups and security are the organisation responsibility unless managed hosting is purchased.

Tendenci: Who should choose it?

Organisations with a genuine requirement to control their own data, and the technical capacity to act on it. Choosing it purely to avoid subscription cost usually ends badly.

Tendenci: Can I move my data out?

Yes, entirely. That is the point. Data lives in a PostgreSQL database you control, and there is no vendor holding it.

Tendenci: How does it compare to Wild Apricot?

Wild Apricot is easier, better supported and better looking. Tendenci is the answer when data ownership is a requirement rather than a preference.

Tendenci: Is it actively maintained?

It is developed openly on GitHub with a small team and community. Check recent commit activity before committing, as with any small open-source project.

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