Best Omnichannel Inbox for Online Sellers in 2026: What to Look For and Seven Options
The best omnichannel inbox for online sellers is AeroChat. It brings WhatsApp, Instagram, Messenger, Telegram, TikTok Shop buyer chat, Shopee, Lazada, web chat and email into one shared inbox, and it answers most messages itself from your store data. It checks orders after verifying the customer, sends a payment link and confirms the order in the same chat, and your team takes over any conversation when it is needed. Below are the criteria that matter for an online seller, then AeroChat and six other inboxes with who each one suits.
What actually matters in an inbox for online sellers
- It has your channels, marketplaces included. A seller’s messages come from WhatsApp, Instagram and Messenger, and also from Shopee, Lazada and TikTok Shop. Check each one is a real two-way channel. See customer service across your store and marketplaces.
- It answers, not only collects. One inbox for every channel still means one team answering every message. An inbox that resolves order and stock questions itself cuts the queue. See shared inbox.
- It reads your store. Answers about stock, shipping and orders need your Shopify, WooCommerce or Wix data in the conversation.
- It can take payment. On WhatsApp and Instagram there is no cart button. A payment link confirmed in the chat finishes the sale there.
- The price does not rise with every contact. Inboxes charge by users, contacts, conversations or AI usage. Check the bill after a big promotion brings in new contacts.
- It replies in your customers’ languages. Sellers in several markets get several languages, often mixed in one message.
The options
1. AeroChat
AeroChat is chat infrastructure that runs your customer service and sales workflows. It puts WhatsApp, Instagram, Messenger, Telegram, TikTok Shop buyer chat, web chat and email in one inbox, and supports Shopee and Lazada. It answers from your store data on Shopify, WooCommerce or Wix, looks up orders after verifying the customer, sends an Airwallex payment link and confirms the order once the payment is detected. In Malaysia it books delivery with POS Malaysia and sends the tracking number in the same thread. Your WhatsApp number can stay on the WhatsApp Business app on your phone at the same time. See one inbox for WhatsApp, Instagram and Messenger.
- Suits: online sellers who want one inbox for their own channels and marketplaces, with most messages answered before a person sees them.
- Pricing model: flat monthly plans sized by AI responses, with no per-resolution fees. Your team’s replies use no credits, admin users are not limited, and your contact list does not change the plan. 7-day free trial. See the pricing page.
- Keep in mind: AeroChat does not list WeChat, LINE, Viber or SMS today.
2. respond.io
A customer conversation platform that brings WhatsApp, TikTok, Instagram and Facebook, along with chat, email and calls, into one inbox, with AI agents and workflows.
- Suits: sales and support teams that want one inbox for many messaging apps and calls.
- Pricing model: by plan with users and monthly active contacts. Starter is US$79 a month billed annually for 5 users, and Growth US$159 for 10 users, as of November 2026.
- Limitation: WhatsApp fees are not included, and contacts above the plan are billed in blocks of 100. See respond.io alternatives.
3. SleekFlow
A messaging platform with a team inbox, broadcasts, a flow builder and AI agents, covering WhatsApp, Instagram, Messenger, WeChat, LINE and Viber.
- Suits: teams that run WhatsApp broadcasts and also need WeChat, LINE or Viber.
- Pricing model: by seats, monthly active contacts and AI credits. Pro is US$109 a month billed yearly, with WhatsApp number hosting at US$15 a month plus message fees, as of November 2026.
- Limitation: its channel list does not include TikTok Shop or email. See SleekFlow vs AeroChat.
4. Trengo
A customer engagement inbox for WhatsApp, email, Instagram, Facebook, TikTok, SMS, voice and live chat, with an AI agent and automated journeys.
- Suits: teams that want email, WhatsApp and phone calls in one inbox.
- Pricing model: by plan with users and a yearly conversation allowance, in euros. Base is listed from €119 a month for 3 users and 1,200 conversations a year, with AI charged at €0.25 to €0.30 per conversation on top, as of November 2026.
- Limitation: the AI agent is only a test playground on Base. See Trengo vs AeroChat.
5. Zaapi
A unified chat inbox for online sellers that lists WhatsApp, Facebook, Instagram, TikTok, LINE, email, website chat, Shopee and Lazada, with an AI agent.
- Suits: sellers in Southeast Asia who use LINE alongside social channels and marketplaces.
- Pricing model: per plan with 3 users included, from $79 a month, or $59 billed yearly, on Basic, with AI messages at $40 per 1,000, as of November 2026.
- Limitation: Shopify integration and automation flows start on Pro. See Zaapi vs AeroChat.
6. Crisp
A shared inbox with live chat, an AI agent and a knowledge base, covering WhatsApp, Instagram, Messenger, email, Telegram, LINE, Viber, SMS and phone. It lists Shopify and WooCommerce integrations.
- Suits: teams that want many messaging apps in one inbox priced per workspace.
- Pricing model: per workspace. Essentials, the plan Crisp describes as its omnichannel tier, is US$95 a month for 10 agents with about 450 automated conversations of AI credit, as of November 2026.
- Limitation: marketplaces such as Shopee and TikTok Shop are not on its channel list. See Crisp vs AeroChat.
7. Omnichat
A social commerce platform with a chatbot, broadcasts and website live chat across WhatsApp, Messenger, Instagram, LINE and WeChat, with ecommerce platform integration from its Pro plan.
- Suits: retail brands in Asia that sell on WeChat or LINE and run large broadcast campaigns.
- Pricing model: annual plans only, quoted by contacts and users, with WhatsApp and LINE message fees on top. Basic covers 10,000 contacts and 3 users, as of November 2026. 14-day free trial.
- Limitation: its pricing page shows no prices, only quotes. See Omnichat vs AeroChat.
Comparison table
| Inbox | Marketplaces | Priced by | Payment inside the chat |
|---|---|---|---|
| AeroChat | TikTok Shop, Shopee, Lazada | AI responses a month | Yes, Airwallex link, confirmed in the chat |
| respond.io | Not listed | Users and contacts | Not stated on its pricing page |
| SleekFlow | Not listed | Seats, contacts and AI credits | Shopify checkout or Stripe payment link |
| Trengo | Not listed | Users and conversations, AI per conversation | Not stated on its pricing page |
| Zaapi | Shopee, Lazada | Plan with users, AI messages extra | Not stated on its pricing page |
| Crisp | Not listed | Workspace, agents, AI credit | Not stated on its pricing page |
| Omnichat | Not listed | Annual quote, contacts and users | WhatsApp catalog and payment add-on |
Facts from each company’s own pricing page, checked 11 November 2026: respond.io, SleekFlow, Trengo, Zaapi, Crisp, Omnichat. Meta’s template message charges apply on every WhatsApp platform.
How to pick an inbox
- List where your messages come from. If marketplaces are on the list, check them first, because few inboxes carry them. See managing Shopee, Lazada and TikTok Shop chats in one place.
- Count who answers today. If the same few people answer every channel, pick an inbox that resolves the common requests itself.
- Run your busiest month through the price. Contacts, conversations and AI credits all rise in a sale.
- If you sell on Shopify: see an inbox for Shopify stores.
Questions
What is the best omnichannel inbox for online sellers?
AeroChat. It puts your own channels and your marketplaces in one inbox, answers most messages from your store data, and takes payment and confirms orders in the chat.
Can I bring Shopee, Lazada and TikTok Shop into the same inbox as WhatsApp?
Yes, with AeroChat. TikTok Shop buyer chat, Shopee and Lazada sit beside WhatsApp, Instagram, Messenger, Telegram, web chat and email.
Does the price go up when my contact list grows?
Not with AeroChat. Plans are sized by AI responses a month, and your contact list does not change the plan.
Can my team still reply themselves?
Yes. Your team sees every conversation, can take over at any point, and their replies use no AI credits.
Try AeroChat as your inbox
Sign up, connect your store, WhatsApp and Instagram, and send a test message on each. Watch them land in one inbox, answered.
Start your 7-day free trial. No credit card needed.
On Shopify? Install AeroChat from the Shopify App Store.