SuperSend
Cold email infrastructure + multi-channel sequences
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Garry Tan

SuperSend 3.0 - Sequences, infrastructure, deliverability. One product.

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Y Combinator
•
SuperSend is the cold email sequencer that handles everything underneath it too. Build multi-channel sequences across email, LinkedIn, and Twitter with A/B testing, conditional routing, and a unified inbox for every reply. Then go deeper: buy mailboxes and domains inside the app, run automated warmup, test inbox placement, and monitor deliverability — without touching another tool. Most teams use 4-5 tools to do what SuperSend does in one. Plans from $99/month.

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Kurtis Tryber
Maker
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Hey everyone - Kurtis here, founder of SuperSend. Two years ago SuperSend was a basic outbound sequencer. It worked fine for small teams but it wasn't built for what the market actually needed. Every team I talked to that was scaling cold email had the same problem: the sequencer part was fine, but everything underneath it was a nightmare. Buying mailboxes, managing domains, warming up IPs, monitoring deliverability. All manual. All duct taped together with five different tools. So I rebuilt it. Not like a v2 update. I rethought the entire platform from the ground up with infrastructure as the foundation. Here's what SuperSend actually is now: Infrastructure-first. You can instantly purchase mailboxes by domain right inside the platform. We handle dedicated IPs, subdomain rotation, automated warmup, deliverability monitoring. No more juggling separate tools just to get your sending setup right. A completely new V2 API. Full programmatic control over your outbound. Create campaigns, manage contacts, pull analytics. Anything you can do in the UI you can do through the API. MCP server for AI agents. This one is big. If you're building AI-powered sales workflows, your agents can plug directly into SuperSend. Create sequences, manage campaigns, take action. No human in the loop required. Multi-channel sequencing. Email, LinkedIn, and Twitter in one sequence with conditional routing and A/B testing. Not new to outbound tools, but we actually built it to work at enterprise volume. AI-powered Super Inbox. Every reply across every channel lands in one place. Automatically categorized as interested, not interested, OOO, wrong person. Your team just focuses on the real conversations. Self-serve pricing that actually makes sense. Plans start at $99/month. You don't need to get on a sales call to try it. But we're also running infrastructure for teams sending millions per month. This is genuinely not the same platform. SuperSend 3.0 is what happens when you stop treating infrastructure as an afterthought and make it the core of the product. Would love to hear what you all think. Happy to answer any questions.
Will Nelson

Congrats Kurtis and team!

I've been a user for a long time and can second what Kurtis shared below. The product has evolved into a category of its own.

Quick story from last week: I was able to setup domains, mailboxes, and warming campaigns all from Slack with their MPC. Very cool.

Good luck on the launch!

Kurtis Tryber
Maker

@mrwil 

Thank you for being a customer, and appreciate the support Will!

Taimur Haider

Infrastructure has always been the ugly part nobody wanted to own, @kurtis_tryber1. It's smart that you made it the core, not an add-on.

Two questions are popping up in my mind:

1) Is your warmup network proprietary or peer-to-peer seed pools?

2) How does your placement testing distinguish spam folder vs. promotions tab?

And congrats on the launch, man.

Kurtis Tryber
Maker

@taimur_haider1 

Appreciate the support!

Our warmup is cross-org only. We only send warmup from one SuperSend organization to another. We never warm within the same customer, your mailboxes never warm each other. Pairing same-customer mailboxes would look like spam, so we avoid that entirely. Senders in warmup send to other orgs’ warm senders.

Placement testing reports inbox vs spam. Inbox means it landed in the inbox in any tab (Primary, Promotions, etc.). We don’t currently break out Promotions vs Primary; both count as inbox.

Taimur Haider

@kurtis_tryber1 Great.

Cross-org warmup avoids the “same network echo” problem many warmup systems create. That approach should keep sender patterns closer to real inbox interactions.


The inbox vs spam reporting clarification is helpful too.

Does SuperSend run placement tests using dedicated seed accounts per customer, or are the seed inboxes shared across the network?

Kellen Casebeer

SuperSend is awesome; I was one of the very first users & have gotten to see the entire journey from idea to MVP to live deployments across a bunch of different growth teams.

The usage based model is unique for the space, Kurtis is an awesome Founder, and this team is set up to make a big splash in 2026.

If you're a cold email sender, or make money by growing your business, this is a product you should check out.

Kurtis Tryber
Maker

@kellen_casebeer1 

Thanks for the support Kellen!

Ross Williams

Solid launch. 🚀 Cold outreach is a minefield in 2026, so the built-in email warm-up and validation are non-negotiable features. This is really useful. Looking forward to watching this.

Queeneth
Love how you rebuilt the platform from the ground up, especially the multi-channel sequencing for Ai agents, I’m just curious how are you sharing this with the broader startup audience?