Best email marketing and automation tools

Email marketing and automation deliver the best results when the tool is genuinely aligned with the business model, the data and the team’s way of working. In e-commerce, integrations with the store, product events and automations such as abandoned cart are key, while in B2B/SaaS scoring, pipeline and lead nurturing move to the forefront. Price differences between platforms often do not result from “quality”, but from the billing model (contacts vs sending volume) and limits. In practice, it also matters whether the team will implement the system independently or rely on API, webhooks and event tracking. In this article, you will go through the selection criteria and a review of the platforms that most often win in specific scenarios. This will help you narrow down the shortlist faster and avoid a tool that will start to hold you back over time.

selection criteria for an email marketing tool

The best email marketing tool is the one that fits your business model, the size of your list and your automation needs. For e-commerce, the priorities are integrations with Shopify/WooCommerce, product events and scenarios such as abandoned cart, where Klaviyo, Omnisend or Brevo often come out on top. For B2B/SaaS, scoring, pipeline and lead nurturing sequences may matter more, and ActiveCampaign and HubSpot Marketing Hub are strong here. If you have to choose one criterion “to start with”, make it whether you need simple newsletters or “always-on” automation journeys.

Cost and scalability depend on the size of the list and sending volume, so compare the price per contact with sending limits (especially at 5–20 thousand contacts, where the difference can amount to several hundred złoty per month). With very large lists (100k+), the importance of a dedicated IP, throttling and deliverability support grows, which are offered, among others, by Klaviyo, Campaign Monitor or enterprise solutions. If the team does not have technical resources, it will get up and running faster with a tool that offers ready-made templates, simple segmentation and predefined automations (e.g. MailerLite or Brevo). If you plan precise event-based scenarios, choose a platform with API, webhooks and event tracking (Klaviyo, ActiveCampaign, HubSpot).

• Match the tool to the goal: newsletters (editor, segments, A/B tests) vs advanced workflows (welcome, winback, onboarding).
• Check integrations and data: store (real-time events) or CRM (funnel stage, tasks, scoring).
• Assess the editor and control over HTML: whether drag&drop is enough or whether you need custom templates.
• Take additional channels into account: email + SMS in one dashboard (Brevo) or e-commerce support (Klaviyo, Omnisend).
• Define analytical requirements: revenue/attribution in e-commerce (Klaviyo, Omnisend) or campaign results linked to CRM (HubSpot, ActiveCampaign).

1. 01Business priorityFit to the model
2. 02Function specificsE-commerce or B2B/SaaS
3. 03Automation levelSimple or advanced
4. 04Cost and scalabilityPrice versus limits

The key is to match the tool to the business model and automation needs, not just the price.

overview of the best platforms for email marketing automation

The best platforms for email marketing automation differ mainly in whether they are designed with e-commerce, B2B/SaaS or rather fast newsletters and straightforward automations in mind. ActiveCampaign is most often chosen when you need advanced automations, tagging, scoring and behaviour-based segmentation, especially in B2B and SaaS. HubSpot Marketing Hub has the edge when you want to connect marketing with CRM, sales and customer service, while also having the full contact history in one ecosystem. If your priority is sales in an online store and revenue attribution, Klaviyo is the e-commerce standard, and Omnisend is a strong alternative.

Klaviyo stands out for event collection (e.g. viewed product, added to cart, checkout started) and campaign revenue reporting, which makes it easier to refine automations such as abandoned cart or dynamic product blocks. Omnisend works well in e-commerce, especially if you care about ready-made store automations and a multichannel approach (e.g. combining email and SMS depending on the package and market). Brevo (formerly Sendinblue) is often chosen when you want to combine email with SMS and simple automations at a reasonable cost with a higher sending volume, while also having transactional notifications and marketing in one tool. GetResponse is an all-in-one approach: email, automations, landing pages, webinars and basic CRM, which is convenient for webinar campaigns with reminder and follow-up sequences.

If speed of campaign preparation and polished templates are key, Mailchimp performs well for newsletters, template-based work and A/B testing, although when it comes to more complex automation it can be less flexible than ActiveCampaign. MailerLite often wins as “value for money” for small businesses thanks to its simple editor, basic automations and smooth implementation (e.g. a welcome sequence and recurring newsletters). Campaign Monitor and enterprise solutions are chosen when template quality, sending stability and working on brand layouts in larger teams matter, where roles, permissions, approval workflows and deliverability support at high volumes are important. In Poland, language, documentation and the local ecosystem also influence the decision, which is why GetResponse and FreshMail are often chosen when local support and quick implementation assistance matter.

automations that genuinely increase sales and retention

Automations that genuinely increase sales and retention are “always-on” scenarios triggered by user behaviour and the stage of the relationship with the brand. The best return usually comes from a welcome series, because it reaches the audience at the moment of greatest curiosity and high intent. The standard is a sequence of 3–5 e-mails that leads from the value promise, through bestsellers/FAQ and social proof, to a starter offer with a time limit. If you are only going to implement one automation at the start, begin with a welcome series, because it monetises a new sign-up the fastest.

In e-commerce, abandoned cart and abandoned browsing work hardest, because they are based on a specific product the user has already considered. In abandoned cart, the standard practice is the first e-mail after 1–2 hours and another after 24 hours, with a dynamic product list and a “Complete purchase” button. In tools such as Klaviyo or Omnisend, you can add a condition not to send a discount to customers with a high propensity to buy and not to cut into margin. Abandoned browsing is often most effective when it is based on event tracking from the store and excludes people who have already bought in the last 7 days.

• Welcome series: 3–5 e-mails leading from value to a starter offer with a time limit.
• Abandoned cart: 1–2 hours after abandonment + follow-up after 24 hours with dynamic products.
• Abandoned browsing: reminder about a specific SKU + recommendations of similar products, based on events.
• Post-purchase and cross-sell: instructions, a request for a review and complementary products in the 7–21 day window.
• Winback / re-engagement: 2–3 e-mails tailored to the buying cycle (e.g. 60 or 180 days), with a price incentive only at the end.

In B2B and SaaS, the biggest impact on retention and pipeline comes from lead nurturing and onboarding based on behaviour, rather than one-off follow-ups. Lead nurturing is worth building as a sequence of 5–8 messages, tied to a persona and a problem, with branching paths depending on clicks. Onboarding in SaaS should get the user to the “aha moment” within 24–48 hours and use in-app events. If the user does not complete step X, they receive instructions, and if they do, they move on to the next steps or an invitation to a webinar. In transactional automations, check the transactional module or SMTP/API integration and consider separate domains/subdomains to protect the reputation of your marketing sends.

1. 01Welcome seriesReaches people at the moment of highest intent.
2. 02Abandoned cartBased on a specific product the user was considering.
3. 03Abandoned browsingRe-engages based on behaviour.

Start with a welcome series, because it monetises a new sign-up the fastest and builds the relationship.

segmentation and personalisation in e-mail marketing

Segmentation and personalisation in e-mail marketing work most reliably when they are based on audience behaviour and data quality, rather than just basic contact fields. RFM segments (Recency, Frequency, Monetary) let you quickly identify VIP customers and differentiate communication, for example by offering early access to promotions instead of discounts for everyone. Personalising content based on clicks, viewed categories and purchase history usually delivers better results than using just a first name in the subject line, because it matches real intent. In e-commerce, a consistent customer ID (e-mail) and store integration with the platform rather than manual CSV imports provide good results, because they make it easier to combine events from multiple devices.

Personalisation should not distort data or results, which is why exclusions (suppression) and segment hygiene are crucial. Drops in open rate often come from sends to inactive or incorrectly mapped contacts, so it is worth excluding people with no opens/clicks for 90–180 days, as well as contacts with hard bounces and spam complaints. If stable results matter to you, start with proper suppression and only then “add” more aggressive personalisation. Equally important is segmentation by funnel stage (prospects, first-time buyers, repeat customers, VIP), because it lets you match the offer to the maturity of the relationship.

Segmentation by consent and preferences reduces unsubscribe risk and allows you to control frequency and communication topics. You can implement a preference centre (frequency, categories) through preference forms (HubSpot, GetResponse, MailerLite) or through tags and custom fields in e-commerce. Dynamic content and product recommendations require a solid product feed and purchase events, and in practice you need to keep an eye on the logic so you do not suggest products that have already been bought. In B2B, firmographic data is useful (industry, role, number of employees, systems used), because it enables filtering by custom properties and automatic data enrichment from forms (ActiveCampaign, HubSpot).

deliverability and sender reputation in e-mail campaigns

Deliverability and sender reputation determine whether your e-mails land in the inbox or end up in spam. Problems most often result from missing domain authentication, so start by configuring SPF and DKIM according to the instructions of the chosen tool. DMARC is best rolled out first in monitoring mode (p=none), and only then should you gradually tighten the policy. If your e-mails are landing in SPAM, first check SPF/DKIM/DMARC, because that is the basic condition for building trust with mailbox providers.

The choice between a shared and a dedicated IP should be based on volume and sending regularity. At a smaller scale, a shared IP usually works better, because you benefit from the reputation of the provider’s pool, whereas a dedicated IP makes sense for high-volume sends and a mature process. When migrating a tool or domain, use warm-up and ramp-up, i.e. gradually increasing volume over 2–4 weeks. Start with the most engaged segments to build a positive signal for Gmail and Outlook.

Maintaining a stable reputation requires list hygiene, frequency control and a correct message structure. Automatically remove addresses with hard bounce, filter functional accounts (e.g. info@, admin@, office@) and keep an eye on spam complaints, because they directly lower reputation. Introduce frequency capping, e.g. a limit of 3–5 marketing emails per week per person (excluding transactional emails), to reduce unsubscribes and list “fatigue”. If you have a problem with complaints or spam traps, switching to double opt-in is one of the fastest ways to improve database quality and deliverability. In the content, avoid “heavy” messages based solely on images, add alt text, keep a clear unsubscribe link and do not use link shorteners in sales campaigns, and if open rates suddenly drop, check blacklists and the results in Postmaster Tools (Gmail).

1. 01Correct domain authenticationConfigure SPF and DKIM
2. 02Implementing DMARCStart in monitoring mode
3. 03Building trustThe key to inboxes
4. 04Choosing an IP addressShared or dedicated

Solid technical foundations and the right reputation-building strategy are key to effective email delivery and avoiding the SPAM folder.

Analytics, testing and optimisation of e-mail marketing results

E-mail marketing analytics should be based on clicks, conversions and revenue, rather than solely on open rate. Open rate can be underreported or inflated by privacy mechanisms, which is why in e-commerce “revenue attributed” and “conversion rate per campaign” are more reliable. It is also worth monitoring revenue per recipient (RPR), because it allows you to compare campaigns of different segment sizes. If you want to know “which email really drives results”, report conversions and revenue per recipient, and treat open rate as supplementary.

A/B tests are most useful when you compare one variable at a time, e.g. the subject line or CTA, leaving everything else unchanged. Tools such as Mailchimp, GetResponse or Klaviyo let you choose a winner by time or by metric (e.g. clicks or revenue), which makes decision-making easier. To keep the results readable in GA4, use consistent UTM tagging, e.g. source=email and medium=newsletter/automation. In a larger team, it is worth introducing a campaign naming convention (e.g. 2026-02_PL_sale_winter), so reports do not drift apart because of inconsistent naming.

Optimising results requires looking at the data over time and at the level of individual automation steps. Cohort and LTV analysis helps answer the question of whether promotions are reducing customer value in the long term — compare customers acquired from different automations (e.g. welcome vs winback) after 30/90/180 days. Measure automations at “flow-level”, step by step: how many people enter, at which stages they drop off and which messages actually convert (Klaviyo and ActiveCampaign show results at node level). Before a larger send, check rendering in Gmail/Outlook and in dark mode, and if you have access to tools such as Litmus/Email on Acid, verify the layout and possible spam-score issues. When the number of unsubscribes rises and CTR falls, implement “list fatigue” control mechanisms, e.g. limit sends to inactive segments and launch a reactivation campaign.

Integrations and data architecture for effective automation

Effective automation is based on integrations and data architecture that deliver events and contact attributes in a consistent and as near to “real time” as possible. In e-commerce, the strongest effect comes from native store integration, because it provides events and full purchase history rather than just manual imports. Klaviyo is particularly strong with Shopify, and Omnisend handles stores well thanks to “out of the box” automations. If automations are to work predictably, start with the data sources (store/CRM) and only then design the scenarios.

In B2B, integration with CRM is key, because it allows you to segment by funnel stage and automatically create sales tasks, so marketing “sees” what sales is doing. ActiveCampaign and HubSpot handle this well, and where a native integration is lacking, teams often turn to Zapier/Make. Integrators speed up processes (e.g. after signing a contract, add the “customer” tag and trigger onboarding), but you need to take task limits and delays into account. For e-commerce events, a native integration is better than a “zap”. When you rely on behaviour-based automation, the priority is the quality and freshness of events, not the number of connected apps.

More complex scenarios require API, webhooks and event tracking, especially when emails are to depend on specific events (e.g. exceeding a limit in an app). ActiveCampaign, HubSpot and Klaviyo have extensive APIs, but even at the planning stage it is worth describing the events and their payload so the data is unambiguous. Equally important is field synchronisation and avoiding conflicts: establish a “system of record” (e.g. CRM for company data, store for purchase data) and update priority rules. If you report more broadly, the minimum standard is consistent use of UTM, and a more advanced approach is combining campaign data with events in GA4 or a warehouse in BigQuery.

The integration architecture also includes forms and landing pages, as well as transactional sends, because these are often the “gateway” to automation and affect the stability of the whole process. GetResponse and HubSpot have their own landing pages and forms, which reduces the number of tools, but can make the design less flexible. In WordPress, integrations are most often done via plugins or embed, with double opt-in and consent mapping properly handled. For transactional emails, the “SMTP vs API” choice is usually decided by reliability and SLA. Brevo offers transactional sends, but in critical systems a dedicated SMTP/API provider and separating domain reputation can be a better solution. If you collect consent via a Consent Management Platform, make sure the consent status is passed to the email tool, to avoid sending without the proper legal basis and to keep a consistent log.

Legal compliance and security in e-mail marketing

Legal compliance and security in e-mail marketing come down to ensuring that sends have the proper legal basis and that data is processed to the minimum necessary extent, in a way that can be easily documented. Usually, you need explicit marketing consent or another legal basis, and the whole process should be described and reproducible. In practice, it is worth following the principle of data minimisation. At the start, collect only the information necessary for the purpose (e.g. email and preferences), and fill in the remaining data later. If you cannot demonstrate where the consent came from and what its content was, the risk increases regardless of the tool you choose.

Double opt-in and a consent register make it easier to defend the process, because they leave a stronger evidential trail (signup date, IP, source and consent wording). In practice, it is a good idea to check whether the platform records a consent log and whether it can be easily exported in the event of a complaint or audit. Every marketing email should include a clear one-click unsubscribe link, and the platform must immediately respect the opt-out by adding the contact to the suppression list. The simplest compliance test is to ask: can the user unsubscribe immediately, and does the system give you certainty that you will not send to them again.

Working with the tool provider also means you need to sort out data processing and data transfer arrangements. If the data is hosted outside the EU, you need the appropriate clauses (e.g. SCCs) and a transfer risk assessment, which is why companies often choose providers with infrastructure in the EU or with clear compliance documents available in the dashboard. In the privacy policy and in the form messaging, clearly identify the data controller, the purpose and frequency of sends, and describe segmentation or profiling (e.g. recommendations), if you use them. In addition, do not mix consent across different channels. Email is a different consent from SMS or telemarketing, so in multichannel tools (Brevo, Omnisend) you need separate consent fields and enforcement of them in automations.

When assessing operational security of the tool, it is worth starting with access control and data retention rules. Enable 2FA and configure roles (admin, marketer, viewer) to reduce the risk of account takeover and spam sends. HubSpot and enterprise tools offer an extensive permissions system, but even on smaller platforms it is good practice to separate logins and use 2FA. The GDPR also imposes obligations relating to retention and the right to be forgotten, so check whether the platform allows full deletion of a contact (not just an unsubscribe) and how long it stores event and campaign logs. Before choosing a provider, ask about security certifications and practices (e.g. ISO 27001/SOC 2, if available), data encryption at rest and in transit, and backup procedures, because these elements directly translate into business risk when dealing with transactional data.