Comparison · InboxRatio Editorial
Mailchimp vs Constant Contact
This comparison is built from three datasets we maintain for every catalog service: documented pricing captured from the vendors' own configurators, the documented-feature matrix compiled from vendor documentation, and user ratings from G2, Capterra and Trustpilot — each value dated at its capture. Neither service has a measured deliverability score yet; we compare only what the data supports.
Editorial verdict — who fits whom
Two mainstream marketing platforms with different documentation habits. Entry pricing is close — $27/mo (Mailchimp Essentials) versus $30/mo (Constant Contact Lite) at 1,000 contacts (checked 2026-08-19/21) — and stays close at 50,000 contacts: $385 versus $430 (checked 2026-08-21). The feature dataset separates them more: Mailchimp documents 39 of the 60 capabilities we track as included, Constant Contact 28, with 15 cells the vendor simply doesn't document (checked 2026-08-21). The AI category is the sharpest contrast — Mailchimp documents AI subject lines, content optimization and segmentation; Constant Contact's pages are silent on all three.
Mailchimp fits teams that want documented AI tooling and the larger review base (32,152 reviews at 4.32/5 versus 12,221 at 4.13/5, checked 2026-08-21). Constant Contact fits organizations that value its documented deliverability consulting and SDKs, and a simpler tier ladder. Neither has a measured InboxRatio deliverability score yet.
Measured deliverability
Inbox placement, measured on our seed list
Mailchimp · tested August 2026
85/100Good deliverability
- Inbox87.8%
- Spam3.6%
- Gmail88/100
- Outlook82/100
- Yahoo91/100
Constant Contact · tested September 2026
92/100Excellent deliverability
- Inbox93.8%
- Spam0.8%
- Gmail96/100
- Outlook91/100
- Yahoo94/100
Same campaign archetype, same seed composition, same measurement window for every service — how we test.
From our pricing dataset
Pricing side by side
Cheapest paid tier covering each volume, and the functional tier — the cheapest tier with automation, API access and vendor-branding removal all included — captured from the vendors' own pricing configurators on monthly billing.
| Volume | Mailchimp | Constant Contact |
|---|---|---|
| 1,000 contactscheapest paid tier | $27/mo | $30/mo |
| 1,000 contactsfunctional tier | $45/mo(Standard) | $30/mo(Lite (entry-based; api/branding unknown)) |
| 50,000 contactscheapest paid tier | $385/mo | $430/mo |
| 50,000 contactsfunctional tier | $450/mo(Standard) | $430/mo(Lite (entry-based; api/branding unknown)) |
Pricing checked 21 August 2026 · monthly billing, prices as shown by the vendor. Where a vendor has no exact step at a volume, the nearest covering step was captured (noted in the dataset).
Full pricing by volume:Mailchimp pricing →Constant Contact pricing →
From our feature dataset
Features side by side
What each vendor documents, category by category: ✓ documented, ◐ partial or tier-gated, × documented as not offered, — not documented by the vendor. All marks reflect vendor documentation, not our testing.
| Category | Mailchimp | Constant Contact |
|---|---|---|
| 4✓2◐ | 4✓2— | |
| Automation | 4✓2◐ | 0✓6◐ |
| AI | 4✓1◐1— | 1✓1◐4— |
| Personalization | 4✓ | 4✓ |
| Analytics | 3✓1— | 2✓2◐ |
| Developer features | 4✓1◐ | 3✓1◐1— |
| Marketing platform | 6✓1— | 4✓2◐1— |
| E-commerce | 2✓3◐ | 3✓1◐1— |
| Deliverability | 9✓5◐3— | 7✓4◐1×5— |
Where they differ most
28 of the tracked capabilities are documented differently; the sharpest contrasts — computed from the dataset, never hand-picked:
| Capability | Mailchimp | Constant Contact |
|---|---|---|
| AI subject linesAI | Documented | Not documented |
| AI content optimizationAI | Documented | Not documented |
| AI segmentationAI | Documented | Not documented |
| Feedback loop handlingDeliverability | Documented | Not documented |
| Deliverability consultingDeliverability | Not documented | Documented |
| Transactional emailEmail | Partial / tier-gated | Not documented |
| SMTP relayEmail | Partial / tier-gated | Not documented |
| Email sequencesAutomation | Documented | Partial / tier-gated |
| Drip campaignsAutomation | Documented | Partial / tier-gated |
| Event-based automationAutomation | Documented | Partial / tier-gated |
Features checked 10 September 2026 · from vendor documentation and official feature pages.
Independent review platforms — shown as context; never part of our measured Deliverability Score
What users say
Mailchimp
3.5/5
32,152 reviews, weightedLarge review base
- Trustpilot2.6/5 · 1,494 reviews
- G24.3/5 · 12,985 reviews
- Capterra4.5/5 · 17,673 reviews
Checked 21 August 2026
Constant Contact
4.1/5
12,221 reviews, weightedLarge review base
- Trustpilot3.9/5 · 1,848 reviews
- G24.1/5 · 7,431 reviews
- Capterra4.4/5 · 2,942 reviews
Checked 21 August 2026
Aggregator scores diverge across platforms by design — read each platform's number with its review count; the weighted average is never shown without them.
Generated from our datasets — every value verified and dated
Frequently asked questions
Is Mailchimp or Constant Contact cheaper at 50,000 contacts?
At 50,000 contacts, the cheapest paid Mailchimp tier covering that volume is $385/mo and the cheapest paid Constant Contact tier is $430/mo — vendor-page prices on monthly billing, last checked 21 August 2026. Which works out cheaper for you also depends on which tier carries the features you need; the side-by-side tables above show both services' entry and functional tiers at each volume.
Do users rate Mailchimp or Constant Contact higher?
Mailchimp averages 3.5/5 across 32,152 reviews and Constant Contact averages 4.1/5 across 12,221 reviews on G2, Capterra and Trustpilot (Trustpilot counts for half of each average, checked 21 August 2026). Review-base sizes differ, so read the averages together with the counts. User ratings are context only — never part of our measured Deliverability Score.
What are the main feature differences between Mailchimp and Constant Contact?
Of the 60 capabilities we track per vendor, Mailchimp and Constant Contact document 28 of them differently. The comparison table above lists the headline contrasts — cells where one vendor documents a capability the other documents as absent or does not document at all. All marks reflect vendor documentation, not our testing.
Has InboxRatio tested Mailchimp and Constant Contact's deliverability?
Mailchimp has a published seed-list placement test dated 31 August 2026. Constant Contact has a published seed-list placement test dated 2 September 2026. The table above shows both services' measured inbox placement and Deliverability Scores. How we test.
Keep reading
Profiles and rankings
- Mailchimp profileFull catalog entry: pricing, features, ratings, sources.
- Constant Contact profileFull catalog entry: pricing, features, ratings, sources.
- Email deliverability rankingMeasured scores across the catalog as test cycles complete.
- Mailchimp vs BrevoSame data-driven comparison for a related pair.
- MailerLite vs MailchimpSame data-driven comparison for a related pair.