5 Best Loops.so Alternatives for Developers (2026)
Looking for a Loops alternative? Compare SendPigeon, Customer.io, Resend, Mailchimp, and ConvertKit on sequences, API access, pricing, and developer experience.
Loops is an email platform built for SaaS companies, focused on sequences and broadcasts with a polished dashboard. If you need more API control, transactional reliability, or inbound parsing, here are five alternatives worth considering.
Best for developers: SendPigeon — sequences API + transactional + inbound, $10/mo
Best for marketers: ConvertKit — visual automation, landing pages, creator-focused
Best for enterprise: Customer.io — multi-channel, advanced segmentation, $100/mo+
Best for transactional only: Resend — clean API, modern DX, no sequences
Best for all-in-one marketing: Mailchimp — everything, but complex and expensive
Why Look for an Alternative?
Loops does a lot well. Reasons developers explore alternatives:
- API scope — Sequence management is dashboard-only, not available via API
- No inbound email parsing — Receiving emails requires a separate service
- Transactional email — Added as a secondary feature, not the core focus
- Pricing — $49/mo minimum for paid features
- Single SDK — Node.js only, other languages use REST directly
- No local dev server — Testing against production API or third-party tools
1. SendPigeon
Best for: developers who want sequences + transactional + inbound in one platform
SendPigeon is API-first. Sequences, transactional email, broadcasts, and inbound parsing — all manageable in code.
| Feature | Details |
|---|---|
| Sequences | Full API — create, edit steps, manage enrollments, analytics |
| Step types | Email, Wait, Branch, Update Contact, Webhook |
| Transactional | Core feature, sub-second delivery |
| Inbound parsing | MX record → webhook, reply threading |
| Broadcasts | Contact management, tags, targeting |
| Local dev | npx @sendpigeon-sdk/cli dev |
| SDKs | Node, Python, Go, PHP |
| Free tier | 3K emails, 1 domain, 500 contacts |
| Pricing | $10/mo (Starter), $15/mo (Growth), $39/mo (Pro) |
Why over Loops: Full API control over sequences, transactional email as core feature, inbound parsing, 4 SDK languages, 4-5x cheaper.
Trade-off: Loops' visual editor is more polished for non-technical users.
2. Customer.io
Best for: growth teams needing multi-channel automation
Customer.io is the enterprise-grade option. Email, push, SMS, in-app, and a powerful visual journey builder.
| Feature | Details |
|---|---|
| Sequences | Visual journey builder, event-triggered |
| Channels | Email, push, SMS, in-app, webhooks |
| Transactional | Yes |
| Segmentation | Advanced behavioral targeting |
| A/B testing | Built-in on campaigns |
| SDKs | Node, Ruby, Python, Go |
| Free tier | No |
| Pricing | ~$100/mo minimum |
Why over Loops: Multi-channel (push, SMS, in-app), more powerful segmentation, A/B testing.
Trade-off: 2x+ the price, steeper learning curve, more than needed for email-only use cases.
3. Resend
Best for: developers who only need transactional email
Resend is focused on transactional email. Clean API, React Email integration, thorough docs. No sequences or marketing features.
| Feature | Details |
|---|---|
| Transactional | Excellent — core focus |
| Sequences | No |
| Broadcasts | Basic (Audiences) |
| Inbound | No |
| SDKs | Node, Python, Go, PHP, Ruby, Elixir, Java, .NET |
| Free tier | 3K emails, 1 domain |
| Pricing | $20/mo (50K emails) |
Why over Loops: Better transactional reliability, more SDK languages, cleaner developer experience.
Trade-off: No sequences at all. If you need automation, pair with another tool.
4. ConvertKit (Kit)
Best for: creators and marketers who need visual automation + landing pages
ConvertKit (now Kit) is popular with creators and newsletter publishers. Email sequences, landing pages, paid newsletters, and commerce built in.
| Feature | Details |
|---|---|
| Sequences | Visual automation builder |
| Landing pages | Yes (built-in) |
| Commerce | Paid newsletters, digital products |
| Transactional | No |
| API | Basic — subscribers, tags, sequences |
| Free tier | 10K subscribers (limited features) |
| Pricing | $29/mo (1K subs, full features) |
Why over Loops: Landing pages, commerce features, larger ecosystem, more mature.
Trade-off: Not developer-focused, no transactional email, no API for sequence management.
5. Mailchimp
Best for: teams wanting everything in one marketing platform
Mailchimp does everything — email, landing pages, social, ads, CRM, automation. It's complex, but it covers every marketing channel.
| Feature | Details |
|---|---|
| Sequences | Customer journeys (visual builder) |
| Broadcasts | Full campaign management |
| Landing pages | Yes |
| Transactional | Via Mandrill (separate product, additional cost) |
| API | Comprehensive but verbose |
| Free tier | 500 contacts, 1K sends/mo |
| Pricing | $13/mo (500 contacts), scales steeply |
Why over Loops: More features (landing pages, ads, social), larger integration ecosystem.
Trade-off: Complex, dated UI, expensive at scale, transactional requires separate Mandrill setup.
Comparison Table
| SendPigeon | Customer.io | Resend | ConvertKit | Mailchimp | Loops | |
|---|---|---|---|---|---|---|
| Sequences via API | Full CRUD | Trigger-only | No | Basic | Basic | Trigger-only |
| Transactional | Core | Yes | Core | No | Via Mandrill | Added later |
| Inbound | Yes | No | No | No | No | No |
| Multi-channel | Email only | Email, push, SMS, in-app | Email only | Email only | Email, ads, social | Email only |
| Visual editor | Dashboard | Advanced | No | Yes | Yes | Polished |
| Free tier | 3K emails | No | 3K emails | 10K subs | 500 contacts | 1K contacts |
| Starting price | $10/mo | ~$100/mo | $20/mo | $29/mo | $13/mo | $49/mo |
Bottom Line
If you're a developer building a SaaS: SendPigeon. Sequences in code, transactional + marketing in one API, $10/mo.
If marketing owns email and needs multi-channel: Customer.io. Pay more, get more.
If you only need transactional: Resend. Clean, focused, reliable.
If you're a creator/marketer: ConvertKit. Landing pages, commerce, audience growth.
If you want everything: Mailchimp. But prepare for complexity and cost.
Next Steps
- SendPigeon vs Loops — detailed head-to-head
- Drip email API guide — build sequences in code
- Drip email API guide — build sequences in code
- Get started with SendPigeon