Email software for accounting firms, matched to how your firm bills.

Who this guide is for

This guide is for partners, practice managers and marketing staff at accounting firms of one to fifty people. Firms of this size usually run a mix of three kinds of work, and each one puts different demands on an email platform. Compliance work, such as annual returns, payroll filings and VAT or sales tax returns, follows a fixed calendar. Bookkeeping work runs on monthly or quarterly retainers, and the main email tasks are onboarding, document requests and billing questions. Advisory work, such as cash-flow planning, succession reviews and business valuations, depends on trust built over months and on follow-up after a proposal.

Most firms do not need every feature a marketing platform offers. They need four things: a list that can be split by service and client size; automations that fire on dates and on document status rather than on a calendar blast; a way to send a proposal follow-up that does not look like a sales drip; and a price that makes sense for the number of clients they actually hold. The sections below compare ten platforms against those four needs, using the prices each vendor publishes on its pricing page.

This page does not rank tools by score. It groups them by what they are built to do for a firm, names the plan a firm would realistically need, and explains where each tool falls short. Prices are taken from each vendor\'s pricing page, checked on 7 October 2026. Vendors change prices, so confirm the current figure on the linked page before you buy.

The ten platforms, one at a time

ActiveCampaign: the best pick for segmented client and advisory work

ActiveCampaign is the tool we would point most firms toward, because it is the only platform on this list whose entry tiers cover the two things a firm needs most: automation that responds to what a client has done, and segmentation that keeps a tax client from receiving an advisory pitch. Its Starter plan at $15 a month lists email marketing, marketing automation and standard CRM and ecommerce integrations. The Plus plan at $49 a month for 1,000 contacts adds standard segmentation and landing pages, and the Pro plan at $79 a month adds advanced segmentation.

For a firm the practical use is a sequence for each service line. A bookkeeping client who has not uploaded last month\'s bank statements can be moved into a reminder path. A compliance client who has finished a year-end return can enter a planning sequence that asks about upcoming changes in the business. A prospect who has requested a cash-flow review can receive a short series that ends with a booking link. Each path is separate, so a firm can change one without affecting the others.

Where it falls short: the price rises with the number of contacts, so a firm that holds a large prospect list will pay more than the starting figure suggests. Segmentation and landing pages are not part of the Starter plan, so a firm that wants to split its list from day one should budget for Plus. ActiveCampaign is also more to set up than a newsletter tool. Plan for a half-day of configuration before the first sequence goes live. The pricing is at activecampaign.com/pricing.

MailerLite: the low-cost start for deadline letters

MailerLite suits a small firm that mainly sends filing reminders, year-end letters and a monthly update. The free plan covers up to 250 subscribers and 2,500 emails a month, which is enough for a sole practitioner with a modest client base. The Comfort plan starts at $12 a month billed monthly, or $10.80 a month billed annually, for the 500-subscriber tier. Its monthly email allowance is ten times the subscriber ceiling of the tier, so a 500-subscriber list can send up to 5,000 emails a month. The Power plan at $25 a month, or $22.50 billed annually, includes unlimited monthly emails at the same starting tier.

The editor is simple, and a firm can produce a clean filing-deadline letter without outside help. That matters during the weeks before a deadline, when the people who usually send the email are the people preparing returns.

Where it falls short: advisory depth is limited. A firm that wants branching journeys based on engagement, or proposal follow-up that tracks each prospect, will outgrow it. It does not offer native SMS, so reminder texts for missing documents need a separate tool. Pricing is at mailerlite.com/pricing.

Brevo: volume pricing and SMS reminders

Brevo is built around email volume, not contact count, and its free plan allows 300 sends a day for up to 100,000 contacts. That makes it attractive to a firm with a large contact list that sends in short bursts. The Starter plan at $9 a month starts at 5,000 emails a month with no daily limit, and the Standard plan at $18 a month adds automation, A/B testing and advanced reports.

Brevo is the strongest of the low-cost options for firms that want to chase missing documents by text as well as email. A reminder that a bank statement is still outstanding reaches a client faster by SMS than by email, and the reply can be handled by the same team that runs the email list. Check the SMS rates in your region before you commit, because they are charged separately from the email plan.

Where it falls short: the price rises with volume, so a busy filing season with many sends in a short window can raise the monthly bill. Its advisory tools are thinner than ActiveCampaign\'s, and firms that want deep client journeys will need to build them with more manual steps. Pricing is at brevo.com/pricing.

Mailchimp: the familiar editor for first client mailings

Many staff already know Mailchimp, and that counts for something in a small office with no marketing hire. The free plan covers up to 250 contacts and 500 sends a month, with a daily limit of 250. The Standard plan starts at $20 a month for the 500-contact selector, with up to 6,000 emails a month at that tier. At 2,501 to 5,000 contacts the price shown on the pricing page is $100 a month, with up to 60,000 emails a month.

Mailchimp works well for a first client newsletter or a simple announcement of new services. It is also a sensible choice for a firm that expects to move to a larger platform later and wants the team to learn email basics on a familiar tool.

Where it falls short: the price moves in steps as the contact list grows, so a firm whose client base is growing will see the bill rise faster than the number of clients. Advisory journeys are basic compared with ActiveCampaign or Drip. Pricing is at mailchimp.com/pricing.

Constant Contact: event invitations for seminars

Constant Contact is designed for ease of use, and its event tools make it a natural fit for a firm that runs a year-end planning evening, a briefing on new tax rules or a breakfast seminar for business owners. Its Lite plan is $12 a month billed monthly, or $10.20 a month billed annually, and the Standard plan at $35 a month, or $29.75 a month billed annually, adds automation, scheduling and A/B testing. Pricing depends on the contact count, and the pricing page notes monthly send allowances that scale with the list.

Where it falls short: there is no free plan after the free trial, and automation for client lifecycles is thin. A firm that wants to send one invitation to a seminar and then a reminder a week before it will find the tool sufficient. A firm that wants a sequence for each client\'s filing year will not. Pricing is at constantcontact.com/pricing.

Campaign Monitor: polished newsletters for premium firms

Campaign Monitor is the right choice when the firm\'s newsletter is part of its brand. Its layouts are clean and suit a quarterly partner letter or a year-end review that goes to high-value clients. The Lite plan starts at $13 a month for the 500-contact band, or $11.70 billed annually, and Essentials is $31 a month, or $27.90 billed annually, for the same band. A 30-day free trial covers up to 500 contacts and 500 emails.

Where it falls short: workflow depth is limited compared with ActiveCampaign or Drip, so a firm that wants branching client journeys will need to combine it with another tool. Pricing is at campaignmonitor.com/pricing.

Kit: a long-term audience for specialist firms

Kit is built around an audience that subscribes to a person more than a brand. A specialist accountant who writes about tax for freelancers, or about bookkeeping for e-commerce sellers, can build a list that follows them across topics. The free plan covers up to 10,000 subscribers with unlimited landing pages, forms, broadcasts and tagging. The Creator plan is $33 a month billed annually and adds visual automations, email sequences and A/B testing of subject lines. The Pro plan is $66 a month billed annually and adds unlimited users and deliverability reporting.

Where it falls short: visual automations and sequences start on a paid plan, so a firm that expects to automate client onboarding should budget for Creator from the start. Kit is less suited to an advisory pipeline with proposals and follow-up owners. Pricing is at kit.com/pricing.

Drip: workflows for firms that run lead funnels

Drip is built around workflows that respond to what a person does on a website, and it suits a firm that runs a lead magnet, such as a guide to filing for freelancers, and follows it with a sequence of tips and a consultation offer. Its pricing is based on the number of people in the audience and is unlimited for email sends. The entry tier is $39 a month for 1 to 2,500 people, and the tier for 9,001 to 10,000 people is $154 a month. A 14-day free trial needs no credit card.

Where it falls short: Drip was built for e-commerce and content businesses. Practice operations such as document requests, client portals and billing do not sit inside it, and the firm will need other tools for them. Pricing is at drip.com/pricing.

GetResponse: webinars and landing pages for education-led firms

GetResponse suits a firm whose growth depends on running webinars about regulation, such as a session on new reporting requirements for small businesses, followed by a landing page and a consultation offer. The Starter plan is $19 a month billed monthly, or $15.58 a month billed annually, and includes unlimited monthly email sends, a welcome series, one automation workflow, landing pages and signup forms. The Marketer plan is $59 a month, or $48.38 billed annually, and adds unlimited workflows, advanced segmentation and abandoned-cart recovery.

Where it falls short: Starter allows only one automation workflow, which is not enough for a firm with several client paths. The abandoned-cart feature is aimed at shops, so a firm will get little use from it. Pricing is at getresponse.com/pricing.

AWeber: plain mailings for traditional practices

AWeber keeps its plans simple. The Lite plan is $15 a month for 500 subscribers and 5,000 email sends, and the Plus plan is $30 a month for 500 subscribers and 6,000 sends. There is a 14-day free trial and no ongoing free plan stated on the pricing page. For a firm that wants a dependable way to send a newsletter and a few client notices, AWeber is adequate.

Where it falls short: automation is basic and the editor feels dated next to newer tools. A firm that wants to build advisory sequences or segment by service line will find it limiting. Pricing is at aweber.com/pricing.

Tools we would skip for accounting work

Three platforms on this subject list appear in comparisons, but they are built for other businesses. Klaviyo lists email plans from $20 a month for 500 profiles, rising to $400 a month for 25,000 profiles. It is designed for online retail and ties messages to purchase and browsing behaviour, which a firm does not have. Customer.io lists Essentials at $100 a month and is built for product-led companies that send messages from application events. Loops offers a free early-stage plan up to 4,000 sends in a rolling 30 days, and its Growing Audience plan is $99 a month, but it is designed for software onboarding rather than client services. None of the three offers anything a firm needs that the tools above do not provide.

How to choose

Start by listing the four or five email jobs your firm does most often. For most firms these are the filing reminder, the document request, the year-end letter, the seminar invitation and the proposal follow-up. Then look at which of those jobs require segmentation, automation or SMS. A job that only needs a single email can be done on almost any platform. A job that needs a client to receive a different sequence depending on their service and whether they have responded requires a tool with segmentation and automation on its entry plan.

Second, estimate the list size honestly for the next twelve months. Count the clients you expect to hold, not just those you hold today, and add the prospects you plan to contact. Most pricing on this page depends on contact or subscriber count, so the figure you use will decide which plan is affordable. Third, decide who will run the tool. A tool that needs a marketing specialist will sit unused in a firm without one. MailerLite, Mailchimp and Constant Contact are easier for staff who are not marketers.

Setting up for deadline season

Most firms make the same mistake: they build one large list, send the same reminder to everyone, and then wonder why clients ignore it. A better approach is to build the list around what each client needs. Create one list or tag for each service line, one for advisory prospects, and one for former clients. Keep client-service messages separate from newsletters so that a client who unsubscribes from marketing still receives the notices the firm is required to send.

Next, set up the reminder logic. A reminder should fire when a document is outstanding, not on a fixed calendar date. If your practice-management system or client portal can send a status change to the email tool, use it. If not, a weekly check of outstanding items and a list-based reminder is still better than a blanket send. Keep the wording factual and short, and never include tax figures or account details in the email body. The email should say that something is waiting and link to the secure portal.

Finally, plan the post-deadline message. A short thank-you note after the filing date, with a question about what the client expects in the coming year, does more for advisory follow-up than a sales pitch. Schedule it before the deadline so it goes out on time.

Migration and setup checklist

If you are moving from a spreadsheet, an older newsletter tool or a shared inbox, the steps below keep the move manageable. Do them in order, and do not start the new sequences until the list is clean.

A note on compliance and client trust

Accounting firms hold sensitive information, and clients expect discretion. Email is not a secure channel for tax returns, bank details or payroll records, so the email should be a prompt to log into the secure portal, not a carrier of the document. Use a unique link for each client, and keep portal access under the firm\'s control. A reminder that says "your year-end documents are ready to review" is safer and more useful than one that lists what is missing.

Be cautious with marketing that touches client status. A notice that a client\'s name appears in a case study or a testimonial needs written permission, and prospects should not be told about the work you have done for other clients. Keep the marketing list and the client-service list apart, so that a prospect who has not yet engaged the firm does not receive detail that only current clients should see.

Advisory follow-up without the hard sell

The advisory work that most firms want to grow is also the work most easily damaged by an aggressive email. A compliance client who has just paid a return fee does not want a sales email the next day. Build the advisory sequence around a question or an insight, such as a short note on cash-flow timing before a quarterly payment, followed a week later by an offer of a short review. Each email should stand on its own, and the offer should appear in the last message, not the first.

Proposal follow-up is the other place where email earns its keep. A proposal sent to a prospect should trigger a short series: a check-in after two days, a single question about the proposal after a week, and a final note that leaves the door open. Stop the sequence as soon as the prospect replies, so that a conversation is never followed by an automated message.

Skip the tools built for other businesses

Firms sometimes choose a tool because a colleague uses it or because it appears in a list of top platforms. A good test is whether the tool\'s core features map to firm work. Retail behaviour triggers, product-usage events and software onboarding do not map to filing deadlines, document requests and advisory proposals. A firm that adopts one of those tools will spend time learning features it cannot use, and it will pay for capacity it does not need.

Where to go next

If your firm is also a consultancy or a financial advisory business, the audience and compliance rules differ, and the guides for those practices cover them separately. Start with the guide that matches your main revenue, then return here if your accounting work is the core of the business.