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Manifest AI vs Octane AI vs Respond.io vs SleekFlow: Which Fits a Shopify Brand in 2026?
Manifest AI, Octane AI, Respond.io and SleekFlow compared for Shopify brands: what each does, pricing, channels and which to choose.
Manifest AI, Octane AI, Respond.io and SleekFlow are often compared, but they solve different problems. Octane AI is a Shopify quiz and personalization tool. Respond.io and SleekFlow are omnichannel messaging platforms for WhatsApp, Instagram and other chat apps, used across many industries. Manifest AI is an AI shopping assistant and support agent built for ecommerce, which sells and resolves orders across web chat, WhatsApp, Instagram and email, with agents built for you. If you're a Shopify brand that wants AI to answer, sell and resolve on its own, Manifest AI is the most direct fit. If you mainly want quizzes, choose Octane AI. If you need a messaging inbox for many channels and teams, compare Respond.io and SleekFlow.
Manifest AI is our product; we've tried to represent every tool fairly. Competitor details were checked against each company's pricing and help pages, and recent pricing breakdowns, in October and November 2026. Confirm current prices before you buy.
Manifest AI vs Octane AI vs Respond.io vs SleekFlow at a glance
| Manifest AI | Octane AI | Respond.io | SleekFlow | |
|---|---|---|---|---|
| What it is | AI shopping assistant and support agent for ecommerce | Quiz builder and personalization for Shopify | Omnichannel messaging platform with AI agents | Omnichannel social commerce messaging with AI |
| Built for | Shopify and ecommerce brands | Shopify brands | Many industries | Many industries, strong in retail and Asia |
| Product recommendations | Yes, from your live catalog in chat | Yes, through quizzes | Via setup and integrations | Via setup and integrations |
| Order support (WISMO, returns, cancellations) | Yes, resolved end to end in Shopify | No | Via integrations and workflows | Via integrations and workflows |
| Channels | Web chat, WhatsApp, Instagram, email, voice | On-site quizzes and pop-ups | WhatsApp, Instagram, Facebook, TikTok and more | WhatsApp, Instagram, Facebook, web chat and more |
| Who builds the AI | Our team, done for you | You (quiz builder) | You | You |
| Pricing model | $0.05 per AI reply ($500/month minimum) | By store revenue and engagements | By plan, users and monthly active contacts | By plan, users and contacts |
| Starting price | $500/month; 30-day free trial | $50/month | $79/month (yearly) | $119/month (yearly, no AI) |
Manifest AI
Manifest AI is an AI shopping assistant and support agent for ecommerce brands, used by 500+ brands and backed by Y Combinator. One agent handles both sides of the conversation: it recommends products from your live Shopify catalog, answers product questions and recovers carts, and it resolves order status, returns, exchanges and cancellations.
- Done-for-you agents: our team builds your agents during onboarding and keeps building new ones for as long as you're a customer.
- Every channel: web chat, WhatsApp, Instagram, email and voice, plus AI embeds on product pages.
- Free helpdesk: with Manifest AI, the BIK helpdesk is free, with unlimited seats and tickets; or hand off to Gorgias, Zendesk or Freshdesk.
- Guarantee: 80%+ automation within 30 days and 90%+ after that, or your money back.
- Results: Brabar saw a 1.49% conversion rate from shoppers who used the assistant, compared with 0.25% for everyone else.
Pricing: $0.05 per AI reply, with a minimum of $500 a month, a 30-day free trial or a 90-day paid pilot.
Considerations: Manifest AI is built for commerce. Non-ecommerce businesses are better served by a general messaging platform.
Looking for an AI agent built for ecommerce? Manifest AI sells and supports across chat, email, Instagram and WhatsApp.
Octane AI
Octane AI is a Shopify app for product quizzes, pop-ups and zero-party data collection. Quizzes guide shoppers to the right product and feed answers into Klaviyo and other tools for personalized email and SMS.
Strengths: polished quiz builder, deep Klaviyo integration, A/B testing and advanced quiz logic on Octane Plus.
Considerations: Octane AI isn't a conversational agent or a support tool. It doesn't answer open questions or resolve orders, so brands usually pair it with a chat or support tool.
Pricing: priced by annual store revenue and monthly engagements: Octane from $50/month (under $1M revenue, 200 engagements) and Octane Plus from $200/month.
Respond.io
Respond.io is an omnichannel messaging platform that brings WhatsApp, Instagram, Facebook, TikTok and other channels into one inbox, with workflows and AI agents. It's used by businesses across many industries, including ecommerce.
Strengths: wide channel coverage, strong routing and workflows, and AI agents on Growth and higher plans.
Considerations: pricing scales with users and monthly active contacts, and ecommerce actions such as order lookups and product recommendations depend on how you set up integrations.
Pricing: Starter $79, Growth $159 and Advanced $279 a month billed yearly (at 1,000 monthly active contacts), with AI agents from Growth. Meta messaging fees are extra.
SleekFlow
SleekFlow is an omnichannel conversational commerce platform with a shared inbox for WhatsApp, Instagram, Facebook, web chat and more, plus broadcasts, payment links and AI. It's popular with retail brands, particularly in Asia.
Strengths: social commerce features, broadcasts and an AI plan option with unlimited AI usage under fair use.
Considerations: plans cap users and contacts, and AI is billed as a separate plan variant. Ecommerce agent behavior needs to be configured by your team.
Pricing: Pro from $119/month and Pro AI from $149/month billed yearly (3 users), Premium AI from $349/month (5 users). WhatsApp fees are extra.
Which should you choose?
- You want AI to sell and resolve orders on its own, across chat, WhatsApp, Instagram and email: Manifest AI.
- You want product quizzes and zero-party data for email and SMS: Octane AI, alongside a chat or support tool.
- You need one messaging inbox for many channels, teams or business lines: Respond.io or SleekFlow.
- You sell mainly through WhatsApp and Instagram in Asia: compare SleekFlow and Manifest AI with BIK, which adds WhatsApp and Instagram marketing.
See what your brand could automate. Our team builds the agents for you, and most brands are live in about 2 weeks.
Verdict
These four tools overlap less than their search results suggest. Octane AI owns quizzes, Respond.io and SleekFlow own multichannel messaging, and Manifest AI is the one built to act as an AI shopping assistant and support agent for ecommerce, with agents built for you and a guaranteed automation rate. Many Shopify brands combine Manifest AI with a quiz tool, but few need both Manifest AI and a separate messaging platform.
80%+ of tickets automated, or your money back. That's the Manifest AI guarantee, written into your contract.
FAQ
Is Manifest AI an alternative to Octane AI?
Partly. Both help shoppers find the right product, but Octane AI does it through quizzes, while Manifest AI does it in conversation and also handles order support. Manifest AI also includes quizzes and product-page embeds.
What is the difference between Manifest AI and Respond.io?
Respond.io is a cross-industry messaging platform where your team builds the workflows and AI agents. Manifest AI is built for ecommerce: its agents know your Shopify catalog and orders, and our team builds them for you.
Is SleekFlow good for Shopify stores?
SleekFlow connects to Shopify and is strong for WhatsApp and Instagram broadcasts and social commerce. Brands that want AI to resolve support and recommend products automatically often add an ecommerce AI agent.
Which is cheapest?
Octane AI starts at $50/month and Respond.io at $79/month billed yearly, but they do less out of the box. Manifest AI starts at $500/month ($0.05 per AI reply) with agents built for you and a free helpdesk included.
