The WhatsApp AI chatbot for businesses worldwide.

Sello is a WhatsApp AI chatbot for businesses of every size, built by CognasisAI. It replies to your customers on WhatsApp 24/7 — in their own language — using your own business information (products, price list, opening hours, FAQs). When something needs a human, it hands off to your team with the full conversation in their inbox.

Sello replies in whichever language the customer writes in — English, Sinhala (සිංහල), Tamil (தமிழ்), Singlish, and dozens of other languages, including mixed-language messages. You don't train separate bots for each language; the same Sello account handles them all.

ChatGPT and most generic chatbots don't know anything about your business — they hallucinate prices, hours, and policies. Sello is grounded on the documents you upload, so every answer is based on your real information. It's also connected to the WhatsApp Business API with a proper team inbox, conversation logs, and seamless human handoff — things general-purpose LLMs don't offer.

Older WhatsApp chatbots follow rigid decision trees: 'Press 1 for menu, press 2 for hours.' They break the moment a customer writes anything off-script. Sello is powered by a large language model fine-tuned for customer service — it understands natural conversation, follow-up questions, mixed languages, and context across the full chat.

Sello uses the official WhatsApp Business API (not the free WhatsApp Business app). We handle the onboarding through Meta's authorised Business Solution Providers — including number verification, display name approval, and template registration. You don't have to figure that part out yourself.

Typically 10 minutes to set up plus 1–3 business days for WhatsApp Business API approval from Meta. Most customers are answering real WhatsApp messages within a week of signing up — and you can keep working on your tone and documents while the approval runs.

Sello has tiered monthly plans by conversation volume — from a self-serve SME plan up to an Enterprise plan with higher volumes, advanced integrations, and dedicated support. Plans are billed in your local currency (LKR, USD, and more). Final pricing is published on www.heysello.com once we exit beta; during the beta, contact us via heysello.com or CognasisAI and we'll match a plan to your usage. There are also Meta conversation charges that depend on the message category and country.

No — that's exactly what Sello is designed to avoid. If your documents don't cover something (a discount code, a custom request, a special enquiry), Sello says so and routes the chat to your team. It will not invent prices, hours, or policies. This is a hard guarantee, not a default we hope holds.

Today, Sello focuses on instant Q&A — it answers customer questions from your business information and, when a customer wants to order or book, hands the conversation to your team to close. In-chat order taking, bookings, and direct product selling are on the roadmap and coming soon. Deeper integrations (POS, calendars, CRM) will arrive with those, or are available now via custom builds from CognasisAI.

Yes. Conversations are private to your business account and never used to train shared models. Data is encrypted at rest and in transit. You can export or delete any conversation, customer, or document at any time. We never sell or share your data with third parties.

Sello is the productized form of CognasisAI's enterprise AI stack. If you need deeper CRM/ERP integrations, regulated-industry compliance (banking, healthcare), on-prem deployment, or fully custom agents, we offer bespoke builds through CognasisAI's chatbot, agent, and intelligent system services. Your Sello data ports over.

Restaurants, cafés, online stores, clinics, salons, tour operators, real estate agencies, coaching businesses, and any company — anywhere in the world — where customers ask the same questions on WhatsApp every day. We focus on SMEs, but larger teams run Sello on our Enterprise plan too. If your team spends more than a few hours a week answering the same WhatsApp messages, Sello pays back its cost very quickly.

Sello is CognasisAI's first SaaS product. CognasisAI is an enterprise AI company headquartered in Colombo, Sri Lanka, that builds intelligent systems, AI agents, chatbots, automation, and knowledge engines for clients worldwide. Sello packages that intelligence stack into a self-serve product so any business — anywhere — can plug it into WhatsApp in an afternoon.