When should a company stay on Mailchimp instead of switching to Brevo (Sendinblue)?

Staying on Mailchimp is recommended if your one-time onboarding, custom API re-engineering, or contract termination costs exceed the 12-to-24 month subscription difference.

⚡ Evaluation Driver: Contact-tier overages & charging for unsubscribed contacts vs Brevo Starter/Business email-volume tiers ★ Verified Tier Schedule • Oct 2026

Mailchimp vs Brevo (Sendinblue): TCO & CSV Schema

Q: How do I map Mailchimp CSV headers to Brevo (Sendinblue) import format?

Exported Mailchimp CSV columns (Email Address, First Name, Last Name, Phone Number, CLEAN_CAMPAIGN_SOURCE) map directly to Brevo (Sendinblue) target columns (EMAIL, FIRSTNAME, LASTNAME, SMS, SOURCE_ATTR (Custom Attribute)) using the local browser CSV header mapper on this page.

12〜36ヶ月の総所有コスト（初期移行コスト含む）を無料で試算。年払い割引とマルチカレンシー決済の最適化を組み合わせ、ブラウザ内で安全にCSVヘッダーをマッピングできます。

1. 総所有コスト (TCO) ＆コスト最適化シミュレーター

利用規模、請求サイクル、初期移行コストを設定して試算

Email Marketing & CRM

Stored Contacts (with 4x/mo Email Volume):

請求プラン

比較期間

初期移行コスト ($)

現在: Mailchimp

--/mo

Total TCO: --

Base $20 + $/unit:

代替案: Brevo (Sendinblue)

--/mo

Total TCO (incl. switch): --

Base $9 + $/unit:

★ Verified Tier Schedule (Brevo Starter/Business vs Mailchimp Standard) Verified: 2026-10-24

Brevo prices primarily by monthly email volume rather than stored contacts (Starter: $9/mo up to 5k emails, $17/mo up to 10k, $25/mo up to 20k, $39/mo up to 40k, $55/mo up to 60k, $69/mo up to 100k; optional $12/mo for removing Brevo branding; Business tier starts at $18/mo for automation/A-B testing). Mailchimp Standard charges by stored contact tiers ($20/mo for 500, $45/mo for 1.5k, $60/mo for 2.5k, $100/mo for 5k, $135/mo for 10k, $230/mo for 15k, $310/mo for 25k, $450/mo for 50k) including unsubscribed/non-subscribed profiles unless archived.

Up to 5,000 Contacts (~20k emails/mo)	$100/mo (Mailchimp Standard 5k)	$25/mo (Brevo Starter 20k) or $37/mo w/o logo
15,000 Contacts (~60k emails/mo)	$230/mo (Mailchimp Standard 15k)	$55/mo (Brevo Starter 60k) or $67/mo w/o logo
50,000 Contacts (~200k emails/mo)	$450/mo (Mailchimp Standard 50k)	$129/mo (Brevo Business / High-Volume Tier)

⚙️ Credit / Tier Complexity Multiplier (for Credit Bundles & Tiered Plans):

Pricing Methodology Note: Because SaaS vendors often price via stepped tiers, email/contact brackets, or variable credit bundles, use the editable $/unit inputs and Credit Multiplier above to match your exact contract quote. Verify published tier rules at Brevo (Sendinblue) Official Pricing & Docs ↗.

Estimated Net TCO Difference

Break-even payback: --

Formula: --

Evaluating...

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Brevo (Sendinblue) 公式サイトで最新料金を確認する →

2. ローカルCSVヘッダーマッパー

Tabular CSV Headers Only

Mailchimp から出力したCSV列名をブラウザ内で Brevo (Sendinblue) 形式に変換します（※CSVのヘッダー行のみを変換します）。

⚠️ Import Readiness & Consent Warning: Renaming CSV column headers does NOT make a file automatically import-ready. Custom attributes must be created in the target platform first, and unsubscribed/opt-out lists must be verified separately to preserve GDPR consent status. Does not convert JSON workflow blueprints.

Source (Mailchimp)		Target (Brevo (Sendinblue))	Field Type / Note
Email Address	→	EMAIL	Documented System Field
First Name	→	FIRSTNAME	Documented System Field
Last Name	→	LASTNAME	Documented System Field
Phone Number	→	SMS	Documented System Field
CLEAN_CAMPAIGN_SOURCE	→	SOURCE_ATTR (Custom Attribute)	Custom Attribute (Create field before import)

Input Sample CSV (Max 5,000 rows): Escape formulas (=,+,-,@)

Mapped CSV Output Preview:

✅ Brevo (Sendinblue) への移行が適している場合

Your primary cost driver is Contact-tier overages & charging for unsubscribed contacts vs Brevo Starter/Business email-volume tiers and your monthly volume exceeds the break-even threshold shown above.
Your team can complete CSV data import and staff onboarding within your budgeted switching cost without disrupting active workflows.
You have verified that Brevo (Sendinblue)'s current plan tier supports your required integrations and regional compliance rules.

✋ Mailchimp を継続すべき場合

Your one-time migration, custom API re-engineering, or staff retraining costs exceed the 12-to-24 month subscription difference.
You are locked into a multi-year agreement on Mailchimp with early termination penalties.
Your workflow depends on custom legacy plugins that are not yet supported by Brevo (Sendinblue).

3. Technical Sensitivity Benchmark: Mailchimp vs Brevo (Sendinblue)

Schema Columns Mapped: 5 fields

The table below models 12-month Total Cost of Ownership across three volume tiers for Stored Contacts (with 4x/mo Email Volume) (including a baseline $150 one-time switching cost on the alternative plan). For credit-heavy or non-linear tier plans, use the interactive Credit Multiplier above.

Volume Scenario (Stored Contacts (with 4x/mo Email Volume))	Current (Mailchimp)	Alternative (Brevo (Sendinblue))	12-Mo Net TCO Outcome
Low Scale (0.5x) (7,500 Stored Contacts (with 4x/mo Email Volume))	$118/mo ($1,416/yr)	$35/mo ($570/yr incl. $150 switch)	+$846 net reduction
Default Baseline (1.0x) (15,000 Stored Contacts (with 4x/mo Email Volume))	$215/mo ($2,580/yr)	$62/mo ($894/yr incl. $150 switch)	+$1,686 net reduction
High / Enterprise Scale (2.5x) (37,500 Stored Contacts (with 4x/mo Email Volume))	$508/mo ($6,096/yr)	$140/mo ($1,830/yr incl. $150 switch)	+$4,266 net reduction

よくある質問 (FAQ) とTCO算出ロジック

How is Total Cost of Ownership (TCO) calculated between Mailchimp and Brevo (Sendinblue)?

SwitchBridge models Mailchimp (illustrative base $20/mo + $0.013 per Stored Contacts (with 4x/mo Email Volume)) against Brevo (Sendinblue) (base $9/mo + $0.0035 per Stored Contacts (with 4x/mo Email Volume)), adding one-time switching costs and billing cycle adjustments. At a sample scenario of 15000 Stored Contacts (with 4x/mo Email Volume), estimated monthly costs are ~$215/mo vs ~$62/mo before switching expenses.

How do I map Mailchimp CSV headers to Brevo (Sendinblue) import format?

Exported Mailchimp CSV columns (Email Address, First Name, Last Name, Phone Number, CLEAN_CAMPAIGN_SOURCE) map to Brevo (Sendinblue) target columns (EMAIL, FIRSTNAME, LASTNAME, SMS, SOURCE_ATTR (Custom Attribute)) using the local browser CSV header mapper above. Custom attributes must be defined in Brevo (Sendinblue) prior to import.

Is SwitchBridge free compared to paid SaaS deal clubs?

Yes. Unlike gated SaaS clubs that charge $199–$499/year for membership, all 61 SwitchBridge TCO calculators and local CSV schema mappers are 100% free ($0 forever) and require no account registration.