Email software for event organizers, matched to how you run events.

Brevo fits organizers whose hardest problems are logistical rather than financial. A volunteer roster of 400 people, an attendee list from past years and a press contact list can all sit in one account. The free plan allows 300 email sends a day and stores up to 100,000 contacts, so the roster costs nothing to keep between events. For a list of that size sending around four messages per event, the free plan covers the announcement, reminders and logistics without a bill.

Where it falls short is depth. Automation and journey logic are more basic than in ActiveCampaign or Customer.io, and the Starter plan at $9 a month covers 5,000 emails with no daily sending limit. Standard starts at $18 a month for automation, A/B testing and advanced reports. Confirm SMS and transactional costs on the pricing page before you plan day-of messaging, because they are not part of the base email price.

A fundraiser dinner, an open day or a yearly conference fits Constant Contact well. The invitation, the sign-up page, reminders and a thank-you message all sit inside one workflow that a committee member can learn in an afternoon. For organizers who run events between other jobs, that simplicity matters more than automation depth.

The limits show up as the calendar grows. Constant Contact has no permanent free plan, only a free trial, and its send allowance on Lite is up to 10 times your contact count. Standard at $35 a month adds automation, scheduling and A/B testing, and Premium at $80 a month adds advanced segmentation and reporting. It does not provide the renewal or pipeline logic that a conference company with sponsors will eventually need.

Conferences and expos sell booths and sponsor packages before attendees register. ActiveCampaign lets a sales team track prospects through stages while marketing sends the right sequence at each step: a prospecting message, an onboarding checklist once a contract closes and a renewal reminder while the event is still fresh. The Starter plan includes a standard CRM, so the pipeline does not require a separate product.

The cost rises with contacts. Starter starts at $15 a month at 1,000 contacts, Plus at $49 and Pro at $79, with Enterprise at $145, all quoted from the same 1,000-contact starting point. Advanced segmentation arrives on Pro. For an attendee-only calendar with no booth revenue, the complexity is not worth paying for. For a sponsor-driven conference, it is one of the few tools that connects sales and email in one record.

A hybrid event runs two audiences at once: people in the room and people watching remotely. GetResponse includes webinars, which lets remote attendees be invited, reminded and followed up from the same account that handles the in-person list. Landing pages and sign-up forms are included from the Starter plan, and abandoned-cart recovery and sales funnels come with Marketer at $59 a month.

The webinar feature is on the Creator plan at $69 a month, so a hybrid organizer should budget for that tier rather than Starter. The interface has more menus than the simpler tools, and the features that matter for event operations, such as exhibitor pipelines, are thin. It is a good choice when remote attendance is a core part of the event.

A new organizer running a first workshop or meetup can use Mailchimp's free plan to send the announcement, a reminder and a thank-you to up to 250 contacts and 500 sends a month. The templates are easy to adapt, and the tool is widely known, so volunteers who have used it elsewhere will not need training.

Costs scale with the contact count. Standard starts at $20 a month for 500 contacts and up to 6,000 emails a month at that size. The 2,501-5,000 contact band is $100 a month for up to 60,000 emails. An organizer who plans to build a multi-year calendar should check the cost at the list size they expect in year three, not year one.

Monthly meetups, club seasons and library programs usually need RSVP forms, a simple announcement and a reminder for each session. MailerLite covers that on a free plan of up to 250 subscribers and 2,500 emails a month. Once the list grows, Comfort starts at $12 a month for a 500-subscriber tier, billed at $10.80 a month if you pay yearly, with a monthly allowance equal to ten times the subscriber ceiling.

The branching and renewal logic is limited. A community calendar with no invoices and no exhibitors can stay here comfortably. A calendar that starts selling booths or memberships will need a tool with pipeline or billing features.

Educator workshops and creator-led summits depend on the host's audience. Kit's free plan includes landing pages, forms, unlimited email broadcasts and audience tagging for up to 10,000 subscribers, which is enough to run a series of summits for a single host. Tags let you separate a workshop cohort from a summit audience without duplicating contacts.

Visual automations and email sequences start on the Creator plan at $33 a month billed yearly, and Pro adds deliverability reporting and unlimited users at $66 a month billed yearly. Kit has no exhibitor pipeline or volunteer scheduling, so it fits a host-centric event better than a multi-stakeholder conference.

A festival with a real merchandise store or a VIP ticket upgrade gains from Klaviyo's commerce features, such as abandoned-browse messages for lineup pages and follow-ups after a purchase. The free plan covers 250 profiles and 500 email sends a month, and the paid email plan starts at $20 a month for 500 profiles, rising to $60 at 2,500 profiles and $150 at 10,000.

Conferences and community calendars rarely need this machinery. The SMS plans are priced separately and are shown as needing a quote, so confirm them before planning day-of messages. Choose Klaviyo when a store is central to the event, not as a general event tool.

An organizer running dozens of events a year, with check-ins, session attendance and content engagement feeding into messaging, needs triggers that respond to behavior across events. Customer.io works from event data and can send email, push and SMS from the same journey. Profile volume determines the price, with Essentials at $145 a month for 10,000 profiles and $235 for 20,000.

It assumes someone on the team can connect event data and maintain journeys. For a smaller calendar, the setup effort is larger than the benefit. The pricing page also lists a startup program with 12 months free for eligible early-stage companies, which applies to companies that have raised under $10 million.