Softwr

Nonprofits · head to head

Constant Contact vs Odoo

Constant Contact logo

Constant Contact

Nonprofits

Email marketing and event management

From
Free
Rated
-
Full reviewWebsite
Odoo logo

Odoo

ERP

Open-source ERP and CRM suite for all business needs

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); Odoo the free plan is limited to one app, so any second module moves the whole account to a paid per user plan
  • They diverge on capability: Constant Contact covers Event management, Odoo covers Sales management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Constant Contact and Odoo differ
AttributeConstant ContactOdoo
PlatformsWeb, Mobile-responsiveCloud, On-premise, Web, Mobile
CategoryNonprofitsERP
Founded19952002

Identical on both: starting price (Free), pricing model (subscription), free tier (Yes), user rating (Not yet rated).

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

  • Event management
  • Contact management
  • Automation
  • Analytics
  • Salesforce
  • Zapier
  • Google Analytics
  • Facebook

Only in Odoo

  • Sales management
  • Inventory
  • Accounting
  • CRM
  • Project management
  • E-commerce
  • Payment gateways
  • Shipping providers

Both cover

  • Email marketing
  • Web support

What people use each for

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

Constant Contact

  • Business operationsnot Odoo
  • Productivitynot Odoo
  • Automationnot Odoo

Odoo

  • Running ERP, CRM, inventory and accounting from one integrated suitenot Constant Contact
  • Starting with a single business app and adding modules over timenot 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)

Odoo

  • The free plan is limited to one app, so any second module moves the whole account to a paid per user plan
  • Standard runs $13.50 to $16.90 per user per month and Custom $20.40 to $25.50, both quoted with a yearly discount applied
  • Implementation services and custom development are not included in any plan
  • Odoo.sh hosting is required for custom modules and is charged separately from the subscription
  • SMS credits and AI scanning are billed on top of the per user price

Pricing, plan by plan

Constant Contact

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

Odoo

Free
  • One App FreeFree
    • Unlimited users
    • One app included
    • Hosted on Odoo Online
  • Standard$13.5/month
    • All apps included
    • Odoo Online hosting
    • Unlimited support, hosting and maintenance
  • Custom$20.4/month
    • All apps, multi-company support
    • Odoo Studio access
    • External API access

Which should you pick?

Choose Constant Contact if

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

Choose Odoo if

  • You need sales management.
  • You want to start without paying.
  • You work on Cloud, On-premise, Web, Mobile.
  • You also want inventory.
Odoo review

Questions people ask

Is Constant Contact or Odoo better?
Neither clearly leads. Constant Contact starts at Free and Odoo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Constant Contact or Odoo?
Constant Contact starts at Free and Odoo at Free.
Does Constant Contact or Odoo run on more platforms?
Constant Contact runs on Web, Mobile-responsive. Odoo runs on Cloud, On-premise, Web, Mobile.
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 Odoo is typically brought in for.
What can Constant Contact do that Odoo cannot?
Constant Contact covers Event management, Contact management, Automation, Analytics. Odoo covers Sales management, Inventory, Accounting, CRM. Both handle Email marketing, Web support.

Answered from the vendors’ own pages

Odoo: How much does Odoo cost per user?

Odoo pricing ranges from $0/month for one free app with unlimited users, to $13.50-$16.90/month per user for Standard, and $20.40-$25.50/month per user for Custom, depending on billing frequency (yearly vs monthly).

Source
Odoo: Is there a free Odoo plan?

Yes, Odoo offers a free plan that includes unlimited users for one app with hosting and support included on Odoo Online.

Source
Odoo: How does Odoo define a paying user?

A paying user is typically an employee who has access to the Odoo backend to create, view, or edit documents. Customers and suppliers accessing portals are free users and do not count toward the seat limit.

Source
Odoo: What is included in Odoo's Standard plan?

The Standard plan at $13.50-$16.90/user/month includes all Odoo apps, hosting, unlimited support and maintenance, daily backups, 24/7 monitoring and security, and free eLearning platform access.

Source
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