SendSeven vs Trengo: The Honest Comparison (2026)

SendSeven Team, Editorial Team

Trengo or SendSeven? A Dutch platform with a seat bundle, conversation quota and native voice module, or a German 8-channel platform from €49/month with no per-user fees? Pricing, channels, AI and GDPR in a fair fact check.

Trengo & SendSeven at a glance

Both vendors are European multichannel platforms, both work GDPR-oriented, both bundle customer channels into one team inbox. Still, they follow a fundamentally different pricing logic and come from different markets. So you can compare cleanly, here are the facts without the marketing language. An overview of every vendor is in our 2026 comparison hub.

Trengo

• Company: Trengo B.V., headquartered in Utrecht, Netherlands.
• Founded: 2017 by its own account; some third-party databases list a different year.
• Positioning: customer engagement platform, or omnichannel team inbox. Its own stated goal: automate up to 90 percent of transactional conversations.
• Company size: 3,000+ customers by its own account and a $36 million Series A round from Insight Partners and Peak Capital (2021).
• Reputation: Trustpilot 4.2 out of 5 (237 reviews), checked on 24 September 2026.
• WhatsApp: Trengo states that it has been certified as a WhatsApp Business Provider since 2022 and connects WhatsApp through the WhatsApp Business API.
• Target audience: e-commerce, hospitality, travel, financial services, automotive. Active across Europe and beyond.

SendSeven

• Company: independent GmbH headquartered in Augsburg, Germany. The founding team brings years of experience from the business messaging industry (including MessengerPeople and Sinch Engage) and operates independently.
• Core product: customer engagement platform with Unified Inbox, AI assistants, campaign builder, Flow Builder, scheduler, MCP server and REST API, all in one interface.
• Target audience: SMBs of any industry, marketing and service teams, and developers.
• Hosting: data stored and processed primarily in the EU (Frankfurt). AI is opt-in and off by default; when enabled, it runs on Google Vertex AI with an EU/US data location under Standard Contractual Clauses and the EU-US Data Privacy Framework.
• Status: Meta Business Partner (since May 2026), Made in Germany.
• Billing: monthly base fee with included messages, publicly listed, no per-user fee.

The pricing model is the real difference

This is where the most important difference sits, and it can be described fairly and without speculation, because both vendors publish their prices. Only the structure is fundamentally different.

Trengo's pricing combines three parts:

• a seat bundle per plan (a fixed number of included users),
• a conversation quota, using conversation-based pricing counted in 7-day conversation windows rather than per individual message,
• usage-based add-ons: an AI surcharge per handled conversation, plus voice and broadcasting as add-ons with no public price.

Trengo plans (as of September 2026)

Extra costs per the pricing page: extra users (Boost €25/month annual / €30/month monthly, Pro €40 / €50), extra conversations €15 per 100 (annual) or €18 per 100 (monthly), an AI surcharge of €0.25 (annual) or €0.30 (monthly) per conversation the AI handles, on top of normal conversation usage. Voice and broadcasting are separate add-ons with no public price. Verified live on trengo.com, 24 September 2026.

SendSeven plans (as of September 2026)

Analytics, campaign builder and widgets are included in every Full Suite plan (Basic to Enterprise), with no per-user surcharge. API Only is the developer plan without inbox or campaign builder, billed per channel. AI assistants come with the Professional plan and up (not Basic), stay opt-in and off by default, and carry no per-conversation surcharge: AI usage is counted in AI Credits that draw from the included bundle and are billed at €0.01 per credit only beyond it. Incoming messages are always free. Details on the pricing page.

The honest core of it: Trengo bundles seats and a conversation quota into one fixed price. Anyone who genuinely uses that capacity gets a predictable package price for it. The catch is that three variables move the bill at once: seats, conversation volume, and the AI surcharge on top. SendSeven has one fixed base fee per plan from €49, with an included message quota and a flat rate after that, no surcharge per user and no per-conversation AI surcharge. Both models are calculable, just shaped differently.

Worked example: what does an 8-person team pay?

Concrete numbers say more than any table. Take a service team of 8 people using WhatsApp, email and live chat, running around 400 conversations a month, with AI handling about 150 of them. One fair note up front: SendSeven counts per platform message, Trengo per conversation (7-day window). The units are not directly comparable 1:1. So we calculate the SendSeven example in messages (about 5 outgoing messages per conversation, so roughly 2,000 outgoing messages; incoming messages are free) and the Trengo example in its conversation quota.

The gap in this scenario is real, but part of it comes from the structure: Trengo's Boost package already bundles 10 seats and a conversation quota, while SendSeven combines a fixed base fee with an included message quota. Does the picture flip at higher volume? Take the same team at 1,500 conversations a month. On Trengo, Boost plus 1,000 extra conversations costs €299 + €150 = €449, and Pro, with that volume included, costs €499, both before any AI surcharge. On SendSeven Professional, roughly 7,500 outgoing messages cost €79 + 5,000 × €0.02 = €179. More seats do not move the SendSeven figure either, because users are unlimited on every plan. The one case where the decision is not about price is telephony: if you need Trengo's native voice module, that is a feature decision, and its add-on price is not public.

Channels compared: voice as Trengo's edge

On channels, the picture is surprisingly even, with one genuine advantage on each side. Trengo ships a native voice and telephony module, meaning calls happen directly inside the platform. SendSeven currently covers telephony only through WhatsApp Voice Calling (beta), not as a standalone call-center module. That's an honest point for Trengo. On the other side, SendSeven offers browser push as an eighth channel, which Trengo does not currently list.

To be fair: both offer Telegram, so that's not a differentiator. The real difference sits at the edges. Trengo scores with telephony, SendSeven with browser push and the fact that all 8 channels are available equally for outbound campaigns and for support, from one inbox.

AI & automation compared

Both vendors lean heavily on AI, but with different billing and a different focus.

Trengo

Trengo's current AI line-up comprises AI Agents, AI Journeys, HelpMate and an AI Voice Agent. Its homepage cites 80 percent of queries resolved before a human steps in, which is Trengo's own figure. On top of that come a chatbot connection to Dialogflow for intent recognition, a rule-based flow bot built by drag-and-drop, and auto-assignment rules. Important for budgeting: AI is billed separately per handled conversation (€0.25 on annual, €0.30 on monthly billing), so no plan includes unlimited AI.

SendSeven

SendSeven's AI comes with the Professional plan and up, with no per-conversation surcharge:

• AI assistants built on a knowledge base (RAG) that indexes documents, web pages and FAQs and answers customer questions in chat, messaging and email conversations.
• Reply suggestions for agents directly in the inbox.
• Live chat translation, so your team can also handle requests in other languages.
• A Flow Builder for no-code automations.
• An MCP server that lets external AI agents such as Claude Desktop, Claude Code and Cursor connect directly to the platform.

Privacy detail: AI is opt-in and off by default. When a team turns it on, it runs on Google Vertex AI (enterprise tier) with an EU/US data location under Standard Contractual Clauses and the EU-US Data Privacy Framework, and the contract rules out using customer data for model training. The cost difference is the most tangible point: at SendSeven, AI usage is counted in AI Credits from the included bundle (€0.01 per credit beyond it); at Trengo, every AI-handled conversation costs €0.25 to €0.30 on top.

API & integrations

Both platforms connect to third-party systems, but with a different philosophy, and that's worth stating fairly and without exaggeration.

Trengo offers 60+ ready-made integrations, including HubSpot, Salesforce, Shopify, WooCommerce and Booking.com, a REST API with webhooks, plus the Dialogflow connection mentioned above for NLU training. For a team without developers, that shortens setup.

SendSeven takes an open, developer-friendly approach: a complete REST API to the OpenAPI specification, webhooks with buffered retries, and connectors for Zapier and n8n that reach thousands of other apps. On top of that comes the MCP server that lets modern AI agents connect directly. That's flexible and covers scenarios outside standard commerce tooling too, but it takes a bit more setup than a ready-made connector. Anyone who needs one specific off-the-shelf integration should check case by case which vendor already has it.

GDPR & data residency

Both vendors provide a data processing agreement and publish a sub-processor list. The verifiable difference sits in where each workload runs, which is what data residency is about.

For context, without judgment: Trengo's terms and conditions name AWS, Planetscale and Elasticsearch in Frankfurt for core infrastructure, with Cloudflare listed as local. Located in the US are OpenAI (Trengo AI), OneSignal (push notifications), Mailgun (receiving forwarded email), Algolia (help-center search) and Telnyx (voice). AI sub-processors in the EU are Langsmith and Google (HelpMate, Journeys). Transfers are covered by Standard Contractual Clauses. That is Trengo's own published list, not a security judgment. Its public security page states hosting on AWS and does not list an ISO 27001 or SOC 2 certification; that doesn't mean none exists, only that it isn't publicly communicated. SendSeven stores and processes data primarily in the EU (Frankfurt). AI is opt-in and off by default; when enabled, it runs on Google Vertex AI with an EU/US data location under Standard Contractual Clauses and the EU-US Data Privacy Framework. Which set of sub-processors applies to you depends on the features you switch on, and both DPAs list the details. More context is in our glossary entry on GDPR-compliant messaging software.

Who fits which platform?

An honest recommendation instead of a winner's trophy. Both platforms have their place.

Trengo is the better choice if ...

• a native telephony and voice channel matters for your support
• you want a Dialogflow connection for chatbot intent training
• you want ready-made connectors from a catalogue of 60+ integrations (including HubSpot, Salesforce, Shopify, WooCommerce and Booking.com) without building anything via API
• a long market track record matters in your selection: Trengo has been on the market since 2017 and reports 3,000+ customers

Two arguments for Trengo sound plausible but do not hold up in numbers. High volume: at 1,500 conversations a month, Trengo costs at least €449 (Boost plus extra conversations) or €499 (Pro), while SendSeven Professional covers roughly 7,500 outgoing messages for €179. A bundled fixed price: Trengo's bill moves with seats beyond the bundle, conversations beyond the quota and the AI surcharge; SendSeven's base fee does not change with team size.

SendSeven is the better choice if ...

• predictable, public pricing with no seat fees matters to you
• you want a fixed base fee that does not grow with team size or with each AI conversation
• you need more channels out of the box, including Telegram and browser push
• you want AI with no per-conversation surcharge
• you want data stored and processed primarily in the EU (Frankfurt), with AI opt-in and off by default
• you need unlimited users with no surcharge and a free self-serve trial
• your developers need to build messaging into your own systems via REST API or MCP

Switching from Trengo to SendSeven

The switch is not a major project. Anyone running Trengo today can move to SendSeven in a few steps:

• Bring over your contacts: export your contacts as CSV and import them into SendSeven, or use the REST API instead.
• Move WhatsApp: request the transfer of your WhatsApp number to SendSeven through Meta and keep the phone number; the steps are in the WhatsApp setup guide.
• Rebuild templates and workflows: recreate message templates and automations in the Flow Builder (Professional plan and up).
• Invite your team: invite every team member, unlimited and with no per-user surcharge.
• Test in parallel: 14 days free, no credit card, so you can compare calmly before switching over.

Frequently asked questions

What is better: SendSeven or Trengo?

It depends on your starting point. Trengo has a native telephony module, 60+ ready-made integrations and 3,000+ customers by its own account, so it fits a team that needs phone support inside the inbox. SendSeven fits better if you want predictable pricing with no per-user fees, no per-conversation AI surcharge, more channels out of the box (Telegram, browser push) and data stored and processed primarily in the EU (Frankfurt).

What does Trengo cost compared with SendSeven?

Trengo starts at €299/month billed annually (Boost, 10 users, 6,000 conversations a year), plus €0.25 per AI-handled conversation. SendSeven starts at €49/month (Basic) and €79/month with AI (Professional), with 2,500 messages included, unlimited users and no per-conversation AI surcharge. For an 8-person team with 400 conversations a month, that is about €336.50 at Trengo against €79 at SendSeven; at 1,500 conversations a month it is €449 to €499 against about €179.

Which telephony or voice features does SendSeven offer compared with Trengo?

Only a limited set. SendSeven supports inbound WhatsApp Voice Calling (beta), but not a standalone telephony or call-center module. Trengo has the advantage here with its native voice module. If a full telephony channel is central for you, that's a point in Trengo's favor.

How do I switch from Trengo to SendSeven?

Export your contacts as CSV or via the API, request the transfer of your WhatsApp number to SendSeven through Meta (the phone number stays the same), rebuild templates and workflows in the Flow Builder, and invite your team with no per-user fees. You can run both systems in parallel during the 14-day free trial to compare.

Where is the data hosted, and is SendSeven GDPR-compliant?

Primarily in the EU: SendSeven stores and processes data in Frankfurt and provides a data processing agreement. AI is opt-in and off by default; when enabled, it runs on Google Vertex AI with an EU/US data location under Standard Contractual Clauses (SCCs) and the EU-US Data Privacy Framework, with no model training on customer data. Trengo's terms name AWS Frankfurt for core infrastructure plus US sub-processors such as OpenAI, OneSignal, Mailgun, Algolia and Telnyx, under SCCs.

How many channels does SendSeven support compared with Trengo?

SendSeven offers 8 channels: WhatsApp, SMS, email, Instagram, Facebook Messenger, Live Chat, Telegram and browser push, all equally available for marketing and service. Trengo covers a broad channel set including a native voice module, but currently doesn't list a browser push channel. Both support Telegram.

Verdict & recommendation

Trengo reports more than 3,000 customers, has been on the market since 2017 and ships a native voice module and 60+ ready-made integrations. For a team that needs telephony inside its support inbox, those are the points that count.

SendSeven pursues a different goal: 8 channels for service and marketing from one inbox, transparent public pricing from €49/month, unlimited users, AI from the Professional plan with no per-conversation surcharge, and data stored and processed primarily in the EU (Frankfurt), with AI opt-in and off by default. Anyone looking for predictable costs with no seat fees and more channels out of the box is better served here.

In the end, the question isn't which tool can do more, but which fits your starting point: the platform with a native voice module and a seat bundle, or the 8-channel platform with a fixed base fee, unlimited users and EU-primary data processing. An overview of other vendors is in the comparison hub, plan details on the pricing page.

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