An executive assistant agency finds and places executive assistants for businesses. A managed executive assistant agency goes further: it recruits, vets, trains and supports the assistant on your behalf, then stays accountable for the result. In an AI world that matters more, because the agency keeps your assistant's AI and automation skills current, provides cover and replacement, and governs how your data is handled, which a single direct hire or a freelancer cannot do alone.
Most companies used to face a simple choice for executive support: hire someone directly or use a recruiter to find them. AI has added a third question. Who keeps that assistant's skills current when the tools change every quarter, and who is accountable when a workflow built on those tools goes wrong?
That is the gap a managed executive assistant agency fills. This guide explains what the model is, why it has become more relevant as AI reshapes the role, and how to tell a good provider from a staffing desk with a new label.
A recruitment agency introduces a candidate, takes a fee and steps away. A task-based virtual assistant marketplace gives you access to a pool and leaves the managing to you. A managed agency sits between the two: it places a named assistant with you and remains responsible for their performance, development and continuity for as long as the engagement runs.
In practice that means the agency handles sourcing, screening, background checks, onboarding, training, quality reviews, holiday cover and replacement if the fit is wrong. You direct the work. The agency makes sure the person doing it stays good at it. For the wider comparison with direct hiring, see [when outsourcing beats hiring](/blog/outsourced-executive-assistant).
The core of the job has not changed. Someone still needs to own the diary, protect focus time, manage the inbox and make sure nothing important falls through. What has changed is how much of the surrounding admin can now be automated, and who decides what should be.
A strong assistant today maps recurring work, decides which steps need human judgement, then builds and supervises automations for the rest using tools like n8n, Zapier, Claude, ChatGPT and the Microsoft or Google suites you already pay for. The job has moved from doing every task to designing how tasks get done. We cover this shift in detail in [what an AI-trained executive assistant actually does](/blog/what-an-ai-assistant-actually-does).
That is a different skill set, and it decays fast. A workflow built on last year's tooling may be slower, more expensive or less safe than what is available now. Individual assistants rarely have the time or budget to keep up alone.
The case for a managed agency has always rested on lower hiring risk and faster starts. AI adds four more reasons.
A full time executive assistant in London typically costs £45,000 to £70,000 in salary, which becomes roughly £5,000 to £6,500 a month once employer National Insurance, pension, equipment and management time are added. Recruitment fees and a two to three month lead time come on top.
A managed agency charges a margin on the assistant's time, but removes the recruitment fee, the notice period risk and the cost of a bad hire. Fractional allocations at around two days a week typically land well below half the cost of a full time hire. Our guide to [what a remote executive assistant costs](/blog/remote-executive-assistant-cost) breaks the comparison down further.
If you need someone physically in the office every day, have a stable full time workload and the capacity to train and manage them yourself, a direct hire can be the better long-term answer. Equally, if you only need a few hours of clearly defined tasks a month, a task-based virtual assistant is cheaper.
The managed model earns its margin where judgement, continuity and AI-enabled process work all matter at once, which describes most founders and senior professionals once the business starts to scale.
Plenty of providers now describe themselves as AI-enabled. These questions separate substance from branding.
A good agency will push you to start narrow. Diary and inbox first, then travel and meeting preparation, then the first mapped and automated process in month two or three. Measuring hours returned from week one makes it easy to decide when to expand. Our [onboarding plan](/blog/onboarding-an-executive-assistant) sets out each stage, and [how to measure the hours an assistant gives back](/blog/measuring-hours-ai-assistant-saves) shows how to track the result.
What does an executive assistant agency do? An executive assistant agency sources, screens and places executive assistants with businesses. Some act purely as recruiters, while managed agencies also train, support and replace the assistant for the length of the engagement.
What is a managed executive assistant agency? A provider that recruits, vets, trains and supports an executive assistant for you, then stays accountable for their performance, cover and replacement for the length of the engagement, rather than stepping away after an introduction.
Is there an executive assistant agency in London that offers fractional support? Yes. Managed agencies such as Alvara Partners place AI-trained executive assistants with London founders and professionals either fractionally, typically two to three days a week, or full time.
How is a managed EA agency different from a recruitment agency? A recruitment agency charges a placement fee and its responsibility largely ends once the candidate starts. A managed agency keeps responsibility for training, quality, holiday cover and replacement while you direct the day-to-day work.
Why does AI make a managed agency more useful? AI tools change quickly and the EA role now includes designing and supervising automated workflows. A managed agency keeps assistants trained, enforces data handling rules and ensures workflows are documented, which is hard for one direct hire to sustain alone.
How much does a managed executive assistant cost in the UK? Fractional support at around two days a week through a managed provider typically costs well under half the roughly £5,000 to £6,500 a month all-in cost of a full time London hire.
Will AI replace the need for an executive assistant agency? AI reduces routine admin but increases the value of judgement, discretion and well-designed processes. Agencies that train assistants to use AI well become more useful, not less.
More insights | Alvara Partners