REPLACE

Replace Mailchimp with SoloStack

Mailchimp charges per contact. 500 contacts? $13/mo. 10,000? $100/mo. 50,000? $350+/mo. SoloStack gives you unlimited contacts with Resend + Neon Postgres for ~$3/mo.

Mailchimp $13–350+/mo

→

SoloStack ~$3/mo

Join Waitlist

THE MAILCHIMP TAX

What you're actually paying for

Mailchimp's pricing scales with your contact count. The more your list grows, the more you pay — even for contacts who never open your emails.

mailchimp.com/pricing

Free $0/mo

500 contacts
1,000 sends/month
Basic email templates
Mailchimp branding on every email
No email scheduling
No A/B testing
30-day email support only

Essentials $13/mo

500 contacts
5,000 sends/month
Remove Mailchimp branding
A/B testing
No advanced automations
No custom templates
Price scales with contacts

Standard $20/mo

500 contacts
6,000 sends/month
Automations
Custom-coded templates
Send-time optimization
$100/mo at 10,000 contacts
$350/mo at 50,000 contacts

Premium $350/mo

10,000 contacts
150,000 sends/month
Advanced segmentation
Multivariate testing
Phone support
Price climbs with list size
$1,510/mo at 100k contacts

YOU'RE PAYING THIS

↓

SoloStack replaces all of this for ~$3/mo

Join Waitlist

FEATURE MAP

Mailchimp feature → SoloStack equivalent

Every Mailchimp feature maps to an open, controllable component you own.

Mailchimp Feature	SoloStack Equivalent	Mailchimp Tier
Contact Management	`contacts` table (Neon Postgres, unlimited, JSONB)	All tiers (limited)
Email Campaigns	Resend API + React Email templates	Free (limited)
Automations	`sequence-engine` + Claude Code agents	Standard ($20/mo)
Landing Pages	Astro pages (unlimited, SEO-optimized)	Free (limited)
Signup Forms	Netlify Forms + `netlify-form` webhook	Free (limited)
Audience Segmentation	SQL queries via Claude Code	Premium ($350/mo)
Analytics / Reports	`events` table + PostHog	Standard ($20/mo)
Email Templates	React Email components (version-controlled)	Standard ($20/mo)
Contact Limits	Unlimited (it's your database)	All tiers limited

HOW IT WORKS

The architecture

No black box. You see exactly how your email marketing stack works.

Forms Netlify Forms

API REST / imports

Webhooks Resend events

Netlify Functions netlify-form · resend · product-signup · stripe

Serverless

Neon Postgres

contacts events sequences email_templates campaigns

Single source of truth

Sequence Engine Automated drip campaigns

Scheduled

Resend Email delivery + tracking

Transactional

CLAUDE CODE

Manages the entire stack via plain English — no UI needed

YOUR EMAIL STACK IS A FOLDER

Email marketing lives in your repo

No SaaS login. No vendor dashboard. Your email system is a set of folders in your monorepo — templates, sequences, and contacts all version-controlled.

solostack/

📂 packages/

📂 emails/ YOUR TEMPLATES

📄 welcome.tsx React Email component

📄 newsletter.tsx React Email component

📁 db/ Neon Postgres migrations

📂 departments/

📁 crm/ Contacts, events, webhooks

📁 marketing/ SEO, content, social

📂 tools/

📂 nurture-designer/ SEQUENCES

Templates are React components

Every email is a React Email component — version-controlled, reviewable, and reusable. No drag-and-drop builder means no vendor lock-in on your designs.

Contacts live in your database

No per-contact pricing. Your contacts table in Neon Postgres holds unlimited subscribers. Tags, segments, and custom fields are just columns and JSONB.

Claude Code is your campaign manager

Instead of clicking through Mailchimp's UI, you type what you want. Claude builds the template, segments the list, sends the campaign, and reports results.

NO MORE CLICKING

Manage email marketing with plain English

Instead of navigating Mailchimp's campaign builder, you type what you want. Watch.

claude — solostack/packages/emails

you: |

Sending campaign "March Product Update" to segment "active-users":

  Template: product-update.tsx (React Email)
  Subject:  "3 new features you'll love"
  Segment:  active-users (opened email in last 30 days)
  Contacts: 2,847 matched

  Sending via Resend API...
  ✓ 2,847 emails queued
  ✓ Estimated delivery: 2-3 minutes
  ✓ Tracking: opens, clicks, bounces → events table

you: |

Created email template "welcome-series-1.tsx":

  ┌─────────────────────────────────────────┐
  │  Welcome to SoloStack                   │
  │  ─────────────────────                  │
  │  [Hero Image: product screenshot]       │
  │                                         │
  │  Hi {firstName},                    │
  │                                         │
  │  Here are 3 things to try today:        │
  │  1. Connect your domain                 │
  │  2. Import your contacts                │
  │  3. Send your first campaign            │
  │                                         │
  │  [CTA: Get Started →]                   │
  └─────────────────────────────────────────┘

  ✓ Template saved to packages/emails/welcome-series-1.tsx
  ✓ Preview: http://localhost:3000/preview/welcome-series-1

you: |

Campaign results for "March Product Update" (sent 2 days ago):

  Delivered:  2,831 / 2,847  (99.4%)
  Opens:      1,247          (44.1%)
  Clicks:       389          (13.7%)
  Bounced:       16          (0.6%)
  Unsubscribed:   4          (0.1%)

  Top clicked links:
  1. /features/sequences    → 156 clicks
  2. /pricing               →  98 clicks
  3. /blog/automation-guide  →  72 clicks

  → All events stored in events table. Query anytime.

THE MATH

Cost comparison

Real numbers. No asterisks.

	Mailchimp Standard (2.5k)	Mailchimp Standard (10k)	SoloStack
Monthly cost	$45	$100	~$3
Annual cost	$540	$1,200	$36
Contacts	2,500	10,000	Unlimited
Sends/month	25,000	100,000	3,000 free / 50k at $20
Automations	Yes	Yes	Yes (Claude Code)
A/B Testing	Yes	Yes	Yes
Custom templates	Yes	Yes	Yes (React Email)
Data ownership	Mailchimp	Mailchimp	You
Vendor lock-in	Yes	Yes	None

HONEST TAKE

When SoloStack isn't the right fit

We're not for everyone. Here's what you should know before switching.

Mailchimp has the best email builder

Mailchimp's drag-and-drop email builder is genuinely excellent. If you need pixel-perfect visual email editing without touching code, Mailchimp wins. SoloStack uses React Email components — powerful but not visual.

No visual email builder

There's no drag-and-drop UI for designing emails. You describe what you want to Claude Code, or write React Email components directly. The results look great, but the process is different.

Best for small businesses who just want newsletters

If you're a bakery sending a weekly newsletter to 200 people, Mailchimp's free tier is probably fine. SoloStack shines when you outgrow free tiers and start paying per contact.

Comfort with Claude Code

You don't need to write code, but you need to be comfortable typing commands. If opening a terminal sounds scary, Mailchimp's polished UI is a better fit for you.

FAQ

Common questions

How do I design emails without drag-and-drop? ▼

You use React Email components — they're like building blocks you describe in plain English. Tell Claude Code 'create an email template with a hero image, three feature blocks, and a CTA button' and it builds a responsive template using React Email. You can preview it instantly in the browser.

Can I import my Mailchimp contacts? ▼

Yes. Export your audience as CSV from Mailchimp (Audience → All contacts → Export), then tell Claude Code to import them. It maps Mailchimp fields (FNAME, LNAME, EMAIL, tags) to your Neon database columns automatically. Tags and segments come over too.

What about email deliverability? ▼

SoloStack uses Resend, which runs on Amazon SES — the same infrastructure behind billions of daily emails. You get proper SPF, DKIM, and DMARC setup included. Deliverability is on par with Mailchimp because the underlying infrastructure is the same enterprise-grade system.

How does Resend pricing compare? ▼

Resend's free tier gives you 3,000 emails/month and 100 emails/day. Their Pro plan is $20/month for 50,000 emails. Compare that to Mailchimp Standard at $20/month for only 500 contacts and 6,000 sends. At 10,000 contacts, Mailchimp charges $100/month — Resend stays at $20/month regardless of contact count.

Can I still do A/B testing? ▼

Yes. You tell Claude Code 'send version A to 20% and version B to 20%, then send the winner to the rest.' It creates two template variants, splits your segment, sends both, waits for results, and picks the winner based on open rate or click rate. Same outcome, no UI needed.

What about signup forms and landing pages? ▼

SoloStack uses Netlify Forms for signups — no code needed, just add a form to any Astro page. Submissions trigger a webhook that writes directly to your contacts table in Neon. No Mailchimp embed codes, no iframe styling issues, and the data lives in your own database.

Explore More

Related tools and resources from across SoloStack

Free Tool

Stop paying the Mailchimp tax

Join the waitlist. We'll build you an email marketing stack that you own, for a fraction of the cost.

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Replace Mailchimp with SoloStack

What you're actually paying for

Mailchimp feature → SoloStack equivalent

The architecture

Email marketing lives in your repo

Templates are React components

Contacts live in your database

Claude Code is your campaign manager

Manage email marketing with plain English

Cost comparison

When SoloStack isn't the right fit

Mailchimp has the best email builder

No visual email builder

Best for small businesses who just want newsletters

Comfort with Claude Code

Common questions

Explore More

Free Automation

Free CRM

Repo Is The Company

SaaS Compression Thesis

Learning Hub

Replace Zapier

Stop paying the Mailchimp tax