SendSeven vs Respond.io: The Honest Comparison (2026)

Respond.io or SendSeven? A capable omnichannel automation platform from Malaysia with a Monthly-Active-Contact billing model and USD pricing, versus an EU-hosted messaging platform with usage-based EUR pricing and no per-contact billing. Channels, pricing, AI, API and data residency in a side-by-side fact check.

Respond.io & SendSeven at a glance

This is a head-to-head between two omnichannel messaging platforms that solve similar problems from very different bases. Respond.io is an automation-first platform built for high-volume conversational sales and support. SendSeven is an EU-hosted messaging platform built for teams that need data residency and predictable usage pricing. Here are the facts without the marketing gloss.

Respond.io

• Founded: 2017 (formerly Rocketbots)
• Headquarters: Kuala Lumpur, Malaysia
• Scale: 10,000+ brands across 85+ countries (self-reported)
• Core product: Omnichannel inbox with a visual workflow builder and AI Agents
• WhatsApp status: WhatsApp BSP since 2023, Meta Business Partner
• Billing: USD, Monthly Active Contact (MAC) model
• Hosting: AWS, region not publicly disclosed; ISO 27001 certified

SendSeven

• Founded: January 2026, independent GmbH headquartered in Augsburg, Germany
• Core product: 8-channel messaging platform with a unified inbox, AI knowledge base and campaign builder
• WhatsApp status: Meta Business Partner, with WhatsApp Coexistence since May 2026
• Billing: EUR, usage-based per message, no per-contact fees
• Hosting: Frankfurt (Google Cloud europe-west3), Vertex AI Enterprise with a contractual no-training guarantee
• Users: Unlimited on every plan, no per-seat charges

Both are Meta Business Partners, so the underlying WhatsApp Business API capabilities are comparable. The differences that matter sit in pricing structure, data residency and how each platform handles scale.

Channel comparison

A channel comparison shows where each platform owns its infrastructure versus where it routes through third parties. Respond.io has impressive channel breadth, including some Asia-Pacific networks that SendSeven does not offer. SendSeven covers the eight channels most relevant to European business communication, with an owned SMS network rather than a third-party reseller layer.

The honest read: if your audience lives on WeChat, LINE or Viber across Asia-Pacific markets, Respond.io has the wider net. For European teams, the channels that matter are WhatsApp, SMS, email and Instagram, all of which both platforms cover. One practical difference: Respond.io resells SMS through third parties such as Twilio or MessageBird, while SendSeven runs its own SMS network, which keeps routing and billing under one roof.

Pricing: MAC model vs usage-based

Pricing is where the two platforms diverge most sharply. Respond.io bills in USD on a Monthly Active Contact (MAC) model. SendSeven bills in EUR per message sent. A Monthly Active Contact is any contact who sends or receives a message in the billing month, which means Respond.io costs scale with how engaged your audience is, not just with how much you send.

Respond.io plans (USD billing)

USD prices convert to EUR at roughly ×0.861 (June 2026); the actual EUR amount your bank charges depends on the exchange rate at billing, so there is ongoing FX risk. Month-to-month billing runs roughly 20 to 25 percent higher than annual. MAC overage is billed at $12 per 100 contacts on Growth and $15 per 100 on Advanced.

Two structural details deserve a flag. First, the Starter plan at $79 is inbound-only: no broadcasts, no automation, no AI Agents and no Developer API. It is a reactive shared inbox. Second, webhooks are gated to the Advanced plan at $279 per month, so any developer integration that relies on real-time events starts there.

SendSeven plans (EUR billing)

Email is billed separately, from €0.01/email on Basic/Professional down to €0.0025 on API Only. Incoming messages are free on every plan, and live conversation translation is free. AI assistants and the knowledge base are included from Professional up; Basic covers inbox, campaigns and analytics only.

Billing model side by side

The MAC model is not inherently bad. For a team with a stable, modest contact base it can be predictable. The risk appears the moment engagement spikes, which is exactly what a successful campaign is supposed to cause. The next section makes that concrete.

If you want to map your own volumes against EUR rates, the SendSeven pricing page lists every per-message rate openly.

Worked example: the MAC math

A worked example shows why the cost driver matters more than the headline price. Consider a mid-size B2C team running a WhatsApp campaign to 5,000 contacts in a single month, with a 30 percent reply rate, plus 4,000 ongoing service conversations.

The key MAC mechanic: broadcast sends do not count, but every contact who replies becomes a billable Monthly Active Contact. So a 5,000-contact broadcast with a 30 percent reply rate creates 1,500 active contacts. Add the 4,000 service conversations and you have roughly 5,500 MAC for the month, against the 1,000 included in the Growth plan.

Respond.io Growth plan

• Growth base: $159 (~€137)
• Included MAC: 1,000
• Billable MAC this month: ~5,500
• Overage: 4,500 contacts at $12 per 100 = $540 (~€465)
• Platform total: ~$699 (~€602) for the month
• Plus Meta WhatsApp message fees on top, identical for both vendors

The overage alone is more than three times the base price. And because it is driven by replies, the better your campaign performs, the higher the bill climbs. On the Advanced plan, that overage rate rises to $15 per 100.

SendSeven Scale plan

• Base fee: €199/month, including 10,000 messages
• Outbound messages billed per message beyond the bundle, not per contact
• Contacts: unlimited and free, however many reply
• Knowledge base, campaign builder and unlimited users: included
• Platform total: driven by messages sent, with no per-contact surcharge
• Plus the same Meta WhatsApp message fees on top

The point is not that SendSeven is always cheaper to the cent. It is that SendSeven's cost is predictable and tied to what you send, while Respond.io's cost rises with engagement you cannot fully control. For a high-engagement B2C program, that distinction can mean the difference between a flat line and a bill that doubles in a good month.

Data residency & GDPR

Data residency is the single most consequential difference for an EU or DACH buyer, and it is worth stating precisely rather than loosely. Both platforms describe themselves as GDPR-compliant, but compliance claims and data location are not the same thing.

Two honest notes in both directions. In Respond.io's favour, it holds ISO 27001 certification, which SendSeven does not. That is a real, audited security credential. In SendSeven's favour, it offers documented EU data residency in Frankfurt and a self-service DPA, while Respond.io does not publish an EU data residency option even at the Enterprise tier, and its DPA must be requested and negotiated by email.

One subtlety that often gets misread: Respond.io lists Rickert in Bonn as its EU GDPR Article 27 representative. That is a legal contact point for EU data subjects, not EU hosting. The representative does not change where the data physically sits. For a buyer whose procurement or works council requires data to remain in the EU, that distinction is the whole ballgame. For more on what GDPR-compliant messaging actually requires, see our glossary entry on GDPR-compliant messaging.

AI & automation

Automation is where Respond.io is genuinely strong, and it would be dishonest to downplay it. This is the area where the platform earns its reputation.

Respond.io automation

• Visual workflow builder: a mature drag-and-drop automation engine for routing, lead qualification and multi-step flows.
• AI Prompt and AI Assist: available on all plans, for reply suggestions and message rewriting.
• AI Agents: autonomous agents that handle conversations end to end, included from the Growth plan under a fair-use policy.

For a high-volume B2C team that wants conversations to run with minimal human touch, this depth is a legitimate advantage. If autonomous automation is the centre of your operation, Respond.io has invested heavily there.

SendSeven AI knowledge base

• Documents, web pages and FAQs are indexed automatically into a retrieval-augmented knowledge base
• The AI answers across WhatsApp, email, Instagram, Messenger, SMS and live chat from one corpus
• Confidence scoring and source citations, with handover to a human when confidence is low
• Hosted on Vertex AI Enterprise in Frankfurt, with a contractual guarantee that customer data is not used to train public models

The framing difference is clear. Respond.io leads with autonomous automation breadth. SendSeven leads with a grounded, EU-hosted knowledge base that prioritises accurate, cited answers and a clean human handover. Neither is universally better; it depends on whether your priority is automation depth or answer reliability under EU data control.

API & developer access

For teams building messaging into their own applications, the question is which plan unlocks the API and at what cost. Here the two platforms gate access very differently.

Respond.io API access

• Starter ($79): no Developer API
• Growth ($159): Developer API available; an MCP server is listed
• Advanced ($279): webhooks added here, not before
• Enterprise: custom

So programmatic access begins at Growth, but real-time webhooks, the foundation of most event-driven integrations, are reserved for the Advanced plan at $279 per month.

SendSeven API access

• API Only plan: from €9 per channel per month, with full REST API, webhooks and the AI knowledge base
• Webhooks on every plan: not gated behind a higher tier
• MCP Server: connects assistants such as Claude, GPT and Cursor
• Documentation: OpenAPI 3.0 specification, public

The practical contrast: a developer who needs the WhatsApp Business API plus webhooks starts at €9 per channel on SendSeven, with webhooks included from the first euro. On Respond.io the same requirement lands on the $279 Advanced plan, because that is where webhooks live.

Migrating from Respond.io to SendSeven

Moving from Respond.io to SendSeven is usually low-friction. A typical migration runs in four steps.

1. Export contacts: Respond.io supports contact export. The file imports directly into SendSeven or through the API.
2. Migrate your WhatsApp number: if you want to keep your existing number, request the transfer to SendSeven through Meta. The WhatsApp setup guide walks through it. WhatsApp Coexistence can also keep a number live without a full Cloud API migration.
3. Swap the live chat widget: remove the old snippet from your site and drop in the SendSeven unified inbox widget.
4. Invite your team: because SendSeven has no per-seat fees, you can add the whole team without changing your plan.

On conversation history: Respond.io stores transcripts in its own system. If you want to retain them, export before you cancel. Note SendSeven's retention policy differs by plan: all Full Suite plans (Basic, Professional, Scale, Enterprise) retain data without a fixed limit, and API Only retains data for 90 days.

Which tool fits whom?

An honest recommendation rather than a winner's trophy. Both platforms have a clear best-fit profile.

Respond.io is the better choice when ...

• You run high-volume B2C conversational sales or support and want deep autonomous automation
• Your audience spans Asia-Pacific networks such as WeChat, LINE or Viber
• You are comfortable with a non-EU vendor and USD billing, including the FX exposure
• ISO 27001 certification is a hard procurement requirement and EU residency is not
• Your contact base is stable enough that the MAC model stays predictable

SendSeven is the better choice when ...

• You need documented EU data residency (Frankfurt) and a self-service DPA
• You want EUR pricing with no FX risk and no per-contact billing surprises
• Your campaigns are high-engagement, where a MAC overage would penalise success
• You want unlimited users and webhooks on every plan, including the entry tier
• You want the eight channels most relevant to European business, with an owned SMS network and a multichannel campaign builder

Frequently asked questions

Does Respond.io offer EU data residency?

Not according to its public documentation. Respond.io hosts on AWS but does not disclose the region, and it does not publish an EU data residency option, not even at the Enterprise tier. It lists an EU GDPR Article 27 representative (Rickert in Bonn), but that is a legal contact point, not EU hosting. SendSeven hosts in Frankfurt and keeps customer data in the EU.

What is the MAC model and how does it affect cost?

MAC stands for Monthly Active Contact. Respond.io counts any contact who sends or receives a message in the billing month. Broadcast sends do not count, but every contact who replies does, plus every contact in an ongoing service conversation. The Growth plan includes 1,000 MAC and charges $12 per 100 contacts beyond that ($15 on Advanced). Because the count rises with engagement, a successful campaign can push the overage well above the base price. SendSeven bills per message instead, so contacts are unlimited and free.

How much does Respond.io really cost?

The headline prices are $79 (Starter, inbound-only), $159 (Growth) and $279 (Advanced), all in USD. The real cost depends on MAC overage. A 5,000-contact campaign with a 30 percent reply rate plus a few thousand service conversations can add several hundred dollars in overage on top of the Growth base. There is also FX risk because billing is in USD, and month-to-month plans run roughly 20 to 25 percent higher than annual.

Is SendSeven GDPR-compliant?

Yes. SendSeven hosts in Frankfurt on Google Cloud, processes AI through Vertex AI Enterprise in Frankfurt with a contractual no-training guarantee, keeps customer data in the EU and provides a self-service DPA. Note that SendSeven is not ISO 27001 certified, whereas Respond.io is; the two platforms have different security credentials.

Can I migrate from Respond.io to SendSeven?

Yes. Export your contacts from Respond.io and import them into SendSeven, request the transfer of your WhatsApp number through Meta (or use WhatsApp Coexistence), swap the live chat widget on your site, and invite your team. Because SendSeven has no per-seat fees, you can add everyone without changing plan. Export any conversation transcripts you want to keep before cancelling.

Does Respond.io have stronger automation than SendSeven?

In raw automation breadth, yes. Respond.io's visual workflow builder and autonomous AI Agents are a genuine strength for high-volume B2C teams. SendSeven focuses instead on a grounded, EU-hosted AI knowledge base with confidence scoring, source citations and clean human handover. The right answer depends on whether your priority is automation depth or answer reliability under EU data control.

How many users are included with SendSeven?

Unlimited, on every plan, with no per-seat fees. Your fixed monthly base fee already includes a message bundle, and you only pay per message once you exceed it. Respond.io includes 5 users on Starter and 10 on Growth and Advanced, with more available on Enterprise.

Which platform is better for a developer integration?

SendSeven gives full REST API access and webhooks on every plan, starting at €9 per channel on the API Only plan, with an OpenAPI 3.0 specification and an MCP server. Respond.io offers the Developer API from the Growth plan, but reserves webhooks for the Advanced plan at $279 per month, so most event-driven integrations start there.

Verdict

Respond.io is a capable, automation-first omnichannel platform with real strengths: a mature visual workflow builder, autonomous AI Agents, wide channel coverage including Asia-Pacific networks, and an ISO 27001 certification. For a high-volume B2C team that is comfortable with a Malaysian vendor and USD billing, it is a serious option.

For an EU or DACH buyer, two factors usually decide it. There is no publicly documented EU data residency, and the MAC billing model ties cost to engagement, so your bill rises precisely when a campaign succeeds. SendSeven answers both directly: data stays in Frankfurt, billing is in EUR with no FX risk, you pay per message rather than per contact, users are unlimited on every plan, and the DPA is a self-service download. SendSeven is not ISO 27001 certified, so if that specific credential is mandatory, weigh it honestly.

If EU data residency and predictable EUR usage pricing are your priorities, start with the SendSeven pricing page and map your own message volumes against the per-message rates.