Conversational AI
Chat and voice AI that greets every visitor, qualifies leads, books demos and answers objections, across web, WhatsApp and email.
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The Next Door AI Private Limited
We built the AI growth team every business deserves.
From first hello to final payment, Supersei works around the clock so you never have to choose between running your business and growing it.
Our mission
Give every business an always-on AI growth team.
Most businesses lose leads not because they don't care, but because no one was there at 2am when the buyer was ready. Sales reps burn out chasing follow-ups. Ads spend money with no proof of return. Payments slip through cracks.
Supersei changes that. Our AI growth engine handles chat, calls, follow-ups, payment collection and ad attribution, so business owners can focus on what they do best: building great products and serving great customers.
- Conversational AI on every channel
Chat, WhatsApp, voice. Your AI rep never goes offline. - Automated follow-ups and lead management
Sequences run, scores update, reps get alerted, without lifting a finger. - Payment collection built in
Send a link mid-call. Partial instalments tracked. Deal marks itself won. - Ad attribution that actually proves ROI
See which campaign earned the money, not just the clicks.
What we build
One platform. Six superpowers.
The Supersei AI growth engine combines everything a sales and marketing team needs, without duct-taping six different tools together.
Lead management
A CRM with real-time lead scoring, hot-lead alerts, pipeline automation and rep routing, so your best leads never wait for a reply.
Payment collection
Send Razorpay or Stripe payment links from inside a call. Partial instalments tracked automatically. Deals flip to Won the moment the bank confirms.
Ad spend attribution
Every rupee of ad spend tracked to the revenue it actually generated. Meta CAPI and Google conversion events fire automatically, so algorithms learn faster.
WhatsApp Business
Official WhatsApp Business API integration. Send approved templates, get delivery and read receipts, send PDFs and images, all from within the CRM.
Automated follow-ups
Multi-step sequences across email, WhatsApp and tasks. "I'll send it Thursday" becomes a scheduled task. Sequences stop the moment a lead replies.
Why Supersei
A super-intelligent guide for business growth.
"Supersei" is a fusion of two words: Super and Sensei. In Japanese tradition, a sensei is a teacher and guide. Someone who helps others grow beyond what they thought possible. We added "Super" because we believe AI can make that guide extraordinary.
We don't believe AI should replace the people who built your business: the rep who knows her customers by name, the founder who answers support tickets himself. We believe AI should work alongside humans, handling the repetitive, the time-sensitive and the 3am follow-ups, so humans can show up fully for the moments that actually matter.
Our values
What we actually believe.
Not a poster on a wall, the decisions we make every day.
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Customer obsession
We build what customers actually need, not what looks good in a pitch deck. Every feature starts with a real problem from a real business.
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Build in the open
We share our roadmap, talk about what's broken, and ship changelogs that are honest. Customers should know exactly what they're getting.
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Ship fast and iterate
A working feature in a customer's hands beats a perfect feature in a backlog. We ship weekly, watch how people use it, and improve fast.
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Security first
Your lead data is worth more than gold. We encrypt it, mask it, audit every access, and make it impossible to walk out the door.
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Data-driven everything
Gut feelings are fun; revenue is better. We instrument everything, measure outcomes, and let the numbers drive product and business decisions.
Our team
Builders obsessed with your growth.
We're a tight-knit team of engineers, designers and growth experts who've spent years inside the problems we're now solving. We've seen sales teams drown in spreadsheets. We've watched good ad budgets disappear with nothing to show. We decided to fix it.
Based in India, one of the world's most competitive business environments, we build for speed, scale and the realities of selling in a market where every rupee of ad spend counts. Our customers are across India and growing globally.
120+
Features live in product
6
Integrated channels
24/7
AI uptime, every day of the year
Engineering
Full-stack, AI, infrastructure
We ship production-grade AI features, not demos. Our stack is built for the speed of Indian internet and the scale of global ambition.
Design
Product and growth design
Every screen you see was designed to reduce friction, not add it. We obsess over the three seconds it takes a rep to understand a hot lead.
Growth and customer success
Onboarding, support, strategy
We don't just hand you a login link. We get in the weeds, help you set up your first automation, and celebrate when your first AI reply lands.
Get in touch
We'd love to hear from you.
Whether you have a question about the product, want to partner with us, or just want to talk about AI and sales automation. Our inbox is always open.