Comparison
Syniaps or Fyxer AI?
A two-year-old London scale-up, $43m raised, an AI inbox secretary sold per seat
What Fyxer AI sells: It sells the instinct of a human executive assistant ("16 million EA data points") that gives you an hour back each day without changing anything in Gmail or Outlook, for $30 to $50 a seat.
Syniaps
4.0 / 5
Fyxer AI
2.7 / 5
Surveyed on 15 September 2026 from the publisher's public pages, cited at the foot of this page. Offers change: check with the publisher before you decide.
Fyxer AI at a glance
- Who
- London, 2023, $43m raised, SOC 2
- Fyxer AI Limited (Great Portland Street, London, incorporated in October 2023), founded by Richard and Archie Hollingsworth and Matt Ffrench, raised a $10m Series A (20VC, Benioff) then a $30m Series B in September 2025 (Madrona, Lakestar), growing from 7 to 56 people. Claimed ARR from $1m to $30m across 2025, 350,000 mailboxes, SOC 2 Type II, ISO 27001, CASA Tier 2 and HIPAA on Enterprise; rated 4.1/5 on Trustpilot (683 reviews) and G2 (20 reviews).
- What
- Triage, drafts, notetaker, inbox chat
- Three blocks inside Gmail or Outlook: automatic triage into eight fixed categories (To Respond, FYI, Marketing...), reply drafts placed in the mailbox for messages that need an answer, and a notetaker that joins Zoom, Meet or Teams to produce summaries and action items. On top of that: Fyxer Chat (questions about the inbox, the meetings and PDFs/CSVs under 10 MB), meeting scheduling, HubSpot, and since the summer of 2026 an MCP server plus bridges to Slack, Teams, Claude and ChatGPT.
- How it gets set up
- An account, mail OAuth, tone instructions
- You create an account, connect Gmail or Outlook (full read access to the inbox and sent items; on Microsoft 365 an IT admin must approve the app first), and Fyxer sorts the last 300 emails within seconds. The documentation puts the starting checklist at around 45 minutes: turn on conversation view, tune the categories, set a signature, write tone instructions (1,000 characters) and upload context documents on the Professional plan, then separately connect the calendar for the notetaker.
- Which models
- Fine-tuned OpenAI, no choice, US inference
- Fyxer says it builds on OpenAI models with fine-tuning and memory, without ever naming the version or offering a choice or a step-up mode; the Drel review notes that the inference provider is not publicly documented. Data is stored on Google Cloud in Belgium and the Netherlands, but the content of the emails passes through the LLM provider for inference (outside the EU), without being used to train third-party models.
- Price
- $30 to $50 a seat, overage billed
- Starter at $30 per user per month ($22.50 annually, one mailbox), Professional at $50 ($37.50 annually, several mailboxes, chat, HubSpot, files), Enterprise by quote from 50 seats with SSO/SCIM; a 7-day trial with a card, converted automatically without a reminder. Incoming mail volume is metered and overage fees apply beyond the plan's quota, the source of several billing complaints ($450 and €900 are cited).
- Who it is for
- Executives and teams drowning in email
- Leaders, sales people, estate agents and professional firms who receive hundreds of emails a day and run back-to-back video calls (named customers include Knight Frank and eXp Realty). It is genuinely strong in English and on Gmail; the Outlook experience and languages other than English are judged weaker.
Point by point
| Criterion | Fyxer AI | Syniaps | Advantage |
|---|---|---|---|
| Intelligence | Fine-tuned OpenAI models, version unpublished, no choice and no mode | Sonnet 5, Opus 5, Fable 5, GPT through Codex or the model of your choice; Standard, In-depth and Maximum modes | Syniaps |
| "Execute" | Sorts, writes, schedules and takes notes; never sends, and acts on no other tool | Files, code, terminal, a browser driven on sites without an API, long jobs, hosted apps | Syniaps |
| Knowledge | The last 300 emails, meeting transcripts, and PDFs/CSVs uploaded by hand | Synapses maintained by the agent from documents, a cloud mirror, email, OCR and retrieval | Syniaps |
| Setup | Mail OAuth then 45 minutes of settings and tone instructions, with fixed categories | A short wizard, then the agent proposes the automations itself, as cards to confirm | Level |
| Learning | Learns tone from edited drafts, with little control over the rest | Retains corrections, skills and preferences, and proposes what it has learnt for approval | Syniaps |
| Sovereignty | SOC 2 II, ISO 27001, GCP in Belgium/the Netherlands, multi-tenant SaaS, OpenAI inference outside the EU | A dedicated OVH machine in France, a sandbox per user, AI processed in Europe if you choose, no certification | Level |
| Entry and price | Self-serve, a 7-day trial, $30 to $50 a seat with AI included, overage billed | A free 7-day trial open within minutes, from €99 excl. tax a month, AI included | The alternative |
| Scope | The inbox, the calendar and the meetings, nothing else | The whole company: missions run end to end by eleven expert teams | Syniaps |
What each one does better
Where Syniaps wins
Acts, does not suggest
Syniaps genuinely executes (files, code, sites without an API, deployments) where Fyxer stops at a draft to review.
Knows the whole company
Synapses build themselves from cloud storage, documents and email, while Fyxer sees only 300 emails and a few uploaded PDFs.
Missions end to end
Server-side missions with the computer off and approval on sensitive moves, against a tool that never sends anything.
Frontier models, your choice
Claude, GPT through Codex or the model of your choice with In-depth and Maximum step-up, against a single unnamed OpenAI model.
A dedicated machine per customer
Physical isolation per customer and per user, with secrets outside the database, rather than a multi-tenant SaaS that reads the entire mailbox.
Where Fyxer AI wins
In within five minutes
An account, Gmail or Outlook OAuth, and triage works straight away, for $30 a seat instead of €99 excl. tax a month.
Certified and hosted in the EU
SOC 2 Type II, ISO 27001, CASA Tier 2 and data on Google Cloud in Belgium and the Netherlands: a security file Syniaps does not yet have.
A readable per-seat price
$30 to $50 per user with AI included, where Syniaps starts at €99 excl. tax a month for the company.
Traction and proof
$43m raised, 350,000 mailboxes, 41m drafts and 90% three-month retention: a product proven at scale.
Native notetaker and HubSpot
The meeting bot joins Zoom, Meet and Teams and logs to HubSpot on its own, a ready-made use case that sells per seat.
Two caveats on its promise
- "Send in one click" rarely holds: testers (tl;dv, eesel, Gmelius) find the drafts "wooden" and often in need of rewriting, for lack of context beyond the inbox, and triage into eight fixed categories sometimes hides important mail.
- The Series B story of "agents that work alongside us" sits oddly with a product that never sends anything, does not name its model, and whose billing (a trial that converts with no reminder, volume overage fees) accounts for a noticeable share of its negative reviews.
The ten criteria, scored and justified
Intelligence
Frontier models (Claude, GPT, Gemini) and ways to step up a gear
Syniaps 5/5
Claude Sonnet 5, Opus 5 and Fable 5, GPT through Codex, or the model of your choice; Standard, In-depth and Maximum modes.
Fyxer AI 2/5
Fine-tuned OpenAI models with no published version, no choice of provider and no step-up mode.
Execution power
Actually acts: files, code, browser, sites without an API, long-running work
Syniaps 5/5
Files, code, terminal, a browser for sites without an API, long jobs in the background, hosted apps.
Fyxer AI 2/5
Sorts, writes, schedules and logs to HubSpot, but never sends, and touches no files, no code, no browser and no site without an API.
Company knowledge
A base built and maintained on its own from documents, email and cloud storage
Syniaps 4/5
Synapses built by the agent, OCR, a full cloud mirror; still young on very large volumes.
Fyxer AI 2/5
Context limited to the last 300 emails, to transcripts and to PDFs/CSVs under 10 MB uploaded by hand.
Zero setup
Nothing to brief, trigger or tick; the tool proposes, the human confirms
Syniaps 4/5
A short wizard, and the agent proposes its automations in conversation; site connections still have to be made once.
Fyxer AI 3/5
Triage and drafts start on their own after OAuth, but the documentation allows 45 minutes of settings, tone instructions and fixed categories that cannot be customised.
Continuous learning
Remembers corrections and preferences without being asked to
Syniaps 4/5
Corrections, skills and preferences are retained and proposed for approval; no learning across customers yet.
Fyxer AI 3/5
Every corrected draft trains the tone (20 to 30 sends for an effect), but the documentation recommends explicit instructions and reviewers note "little control over the personality".
Autonomy
Missions and automations server-side, computer switched off, human approval on sensitive moves
Syniaps 4/5
Missions and scheduled actions run server-side with your computer off, with approval cards; mission ceilings still need tuning.
Fyxer AI 2/5
It runs server-side (triage, drafts, meeting bot, HubSpot) without the computer being on, but there is no mission and no end-to-end automation: everything ends in a draft to review.
Integrations and connections
Everyday tools, MCP, cloud storage, email, sites without an API
Syniaps 4/5
Email, cloud storage, meetings, WhatsApp, LinkedIn, MCP, sites without an API; fewer native connectors than a Zapier.
Fyxer AI 3/5
Gmail, Outlook, Zoom/Meet/Teams, Slack, Teams, HubSpot, an MCP server and Claude/ChatGPT bridges, but no file storage, no WhatsApp, nothing for sites without an API and no per-user API keys.
Sovereignty and security
EU hosting, per-customer isolation, EU or on-premise inference, certifications
Syniaps 3/5
A dedicated machine in France (OVH), strong per-user isolation and AI processed in Europe if you choose; no on-premise option and no certification.
Fyxer AI 3/5
SOC 2 II, ISO 27001, CASA Tier 2 and GCP storage in Belgium/the Netherlands, but a multi-tenant SaaS, OpenAI inference outside the EU, no on-premise option and a subprocessor list behind restricted access.
Teamwork
Shared spaces, roles, delegation, company-wide memory
Syniaps 4/5
Company sources connected once, shared synapses, role profiles, shared skills and conversations, shared mailboxes in missions; no SSO and no fine-grained roles.
Fyxer AI 3/5
Roles, teams, default settings and shared meeting notes, with SSO/SCIM reserved for Enterprise (50 seats minimum), no shared company memory and no delegation.
Price and access
Total cost (tool + AI + machine) against what you get, and how easily you start
Syniaps 3/5
A dedicated machine, AI included and a 7-day trial that opens within minutes, from €299 excl. tax a month; a card is required for the trial and there is no free tier.
Fyxer AI 4/5
Self-serve with a 7-day trial, $30 to $50 a seat with AI included, but a trial that converts without a reminder, volume overage fees and recurring billing complaints.
Verdict
The inbox: Fyxer's front door, one brick among many for Syniaps
Fyxer AI
Fyxer is a sharp, self-serve, certified inbox secretary that gives time back without ever taking a decision.
Natural fit: English-speaking executives, sales people and professional firms with heavy email and meeting volume, on Google Workspace.
Syniaps
Syniaps makes email one flow among others for an intelligence that runs whole missions on a dedicated machine.
Natural fit: companies that want to hand over end-to-end missions (sales, legal, development, finance), not just save an hour on their inbox.
Fyxer sets the psychological price of "email handled" at $30: Syniaps must sell the mission, never inbox triage.
Make triage and mail drafts as immediate as Fyxer's from day one, since that is the front door the market understands, without ever making it the argument. Close the paperwork gap (SOC 2, a security page) before "certified and $30" becomes the standard objection to "a dedicated machine and €99, AI included".
Public sources (23)
- https://www.fyxer.com
- https://www.fyxer.com/pricing
- https://www.fyxer.com/security
- https://www.fyxer.com/press
- https://www.fyxer.com/changelog
- https://www.fyxer.com/blog/series-b-statement
- https://app.fyxer.com/terms-of-use
- https://docs.fyxer.com/get-started/im-new-to-fyxer.md
- https://docs.fyxer.com/using-fyxer/integrations.md
- https://docs.fyxer.com/using-fyxer/chat-with-fyxer.md
- https://docs.fyxer.com/workflows/fyxer-in-practice/workflows-by-use-case/make-fyxer-sound-exactly-like-you.md
- https://docs.fyxer.com/teams-and-admins/security-and-data.md
- https://docs.fyxer.com/teams-and-admins/admin-controls-and-settings.md
- https://support.fyxer.com/en/articles/11099253-where-fyxer-data-is-stored-server-locations-jurisdiction
- https://slack.com/marketplace/A0B79ESD25N-fyxer
- https://www.eu-startups.com/2025/09/british-startup-fyxer-ai-bags-e25-5-million-to-free-professionals-from-repetitive-admin-work/
- https://drel.ai/blog/fyxer-ai-security-review
- https://gmelius.com/blog/fyxer-ai-review
- https://tldv.io/blog/fyxer-ai-review/
- https://www.eesel.ai/blog/fyxer-ai-reviews
- https://dynalord.com/blog/fyxer-pricing
- https://ca.trustpilot.com/review/fyxer.com
- https://www.g2.com/products/fyxer/reviews
Fyxer AI is a trademark of its publisher, cited here for the purpose of objective comparison. Syniaps is neither affiliated with nor a partner of that publisher. Found an error in this comparison? Write to us at [email protected] and we will correct it.