The best choice depends on list size, team size and how much testing you need, not on the longest feature list. Low cost entry points start at $9 per month with Brevo and $13 per month with Mailchimp, while enterprise marketing suites start at $1,500 per org per month with Salesforce Marketing Cloud. HubSpot, Mailchimp, Klaviyo, Brevo, Semrush and Ahrefs offer a free plan or a limited free tier, while ActiveCampaign and Optimizely do not offer a permanent free plan.
We compared 9 options for best b2b saas optimization tools for marketing. Each profile below lists the price, free plan, pros and cons as published by the company.
On this page
Best b2b saas optimization tools for marketing: comparison table
Swipe the table sideways on a phone to see every column.
| # | Name | Best for | Starting price | Free plan / trial | Link |
|---|---|---|---|---|---|
| 1 | HubSpot Marketing Hub | All in one CRM and marketing | $20 per seat/month | Yes | Visit |
| 2 | Salesforce Marketing Cloud | Large Salesforce teams | $1,500 per org/month | No | Visit |
| 3 | ActiveCampaign | Automation for growing B2B lists | $15 per month | No, free trial (14 days) | Visit |
| 4 | Mailchimp | Small teams starting email marketing | $13 per month | Yes | Visit |
| 5 | Klaviyo | Data led email for B2B commerce | $20 per month | Yes | Visit |
| 6 | Brevo | Low cost email and CRM | $9 per month | Yes | Visit |
| 7 | Semrush | Search research and rank tracking | $139.95 per month | Yes, limited free plan | Visit |
| 8 | Ahrefs | Link and keyword research | $129 per month | Yes, limited free plan | Visit |
| 9 | Optimizely | Enterprise experimentation | quote only | No | Visit |
The 9 best best b2b saas optimization tools for marketings, in detail
HubSpot Marketing Hub
Best for: All in one CRM and marketing
HubSpot Marketing Hub combines email marketing, forms, landing pages, automation, ad management and reporting with the HubSpot CRM. The free tier includes 2,000 email sends per month with HubSpot branding. Starter is priced per seat and includes 1,000 marketing contacts.
- Professional includes 2,000 contacts and 3 core seats, while Enterprise includes 10,000 contacts and 5 core seats.
- The main trade off is cost at the middle tier.
- Professional is listed at $890 per month, with a one time onboarding fee of $3,000, and Enterprise is listed at $3,600 per month, with a one time onbo
- Teams that need full automation, A/B testing and custom reporting will need Professional or above, so the entry price is not the price most growing B2
Pros
- Free CRM tools to start
- marketing, sales and service data in one place
- automation, landing pages and reporting in the same account
Cons
- Professional and Enterprise tiers add a one time onboarding fee, and costs rise with marketing contacts
Salesforce Marketing Cloud
Best for: Large Salesforce teams
Salesforce Marketing Cloud Next Growth Edition is listed at $1,500 per org per month, billed annually. The Advanced Edition is listed at $3,250 per org per month, billed annually. Growth Edition includes Campaign Agent content, multi channel journeys, forms and landing pages, consent management and campaign attribution reporting.
- The cost model needs careful reading.
- Pricing is per org, not per user, and additional email sends, SMS and WhatsApp are charged on a usage basis.
- Account Engagement+, which adds B2B lead nurturing and scoring, is listed separately at $1,250 per org per month, billed annually.
- A team that needs B2B scoring and analytics should price that add on before comparing Salesforce with a lower cost automation tool.
Pros
- Built on the Salesforce platform with Data 360
- multi channel journeys, forms and landing pages in Growth Edition
- campaign attribution reporting included
Cons
- No free plan, and the entry price is far above most small team tools, with usage charges on top
ActiveCampaign
Best for: Automation for growing B2B lists
ActiveCampaign sells four email plans: Starter, Plus, Pro and Enterprise. At 1,000 contacts on annual billing, Starter is $15 per month, Plus is $49 per month, Pro is $79 per month and Enterprise is $145 per month. Starter includes multi step automation, templates and A/B testing.
- Plus adds landing pages and predictive sending.
- Pro adds conditional content and attribution, and Enterprise adds single sign on and custom reporting.
- The contact based model is the main cost driver.
- At 10,000 contacts, Starter is $149 per month and Plus is $189 per month on annual billing, according to pricing guides that read the vendor page.
Pros
- Strong automation builder with branching
- plans scale by contact count
- predictive sending and conditional content on higher tiers
Cons
- No permanent free plan, and the price rises sharply as the contact list grows
Mailchimp
Best for: Small teams starting email marketing
Mailchimp offers a free plan, Essentials, Standard and Premium. The free plan covers 250 contacts and 500 sends per month, with a daily cap of 250 sends. Essentials starts at $13 per month at 500 contacts, Standard starts at $20 per month at 500 contacts, and Premium starts at $350 per month at 10,000 contacts.
- Standard adds predictive segmentation and dynamic content, while Premium adds phone support and multivariate testing.
- Mailchimp counts subscribed, unsubscribed and non subscribed contacts toward the billing tier until they are archived or deleted, so list hygiene has
- Essentials caps automation flows at four steps, which is a real limit for B2B nurture programs that need longer sequences.
- Teams that outgrow that cap will need Standard, where automation expands to around 200 steps.
Pros
- Simple setup and a free tier for very small lists
- Essentials and Standard cover forms, surveys and automation
- wide integration list
Cons
- Free plan is limited to 250 contacts and 500 sends per month, and the price rises with total contacts, including unsubscribed contacts
Klaviyo
Best for: Data led email for B2B commerce
Klaviyo is best known for ecommerce, but its profile based model also fits B2B sellers with a store, a catalogue or a repeat order cycle. The free plan covers up to 250 active profiles and 500 emails per month. The Email plan starts at $20 per month for 500 active profiles and includes 5,000 emails per month at that tier.
- Prices rise with active profiles, at $30 per month at 1,000 profiles and $100 per month at 5,000 profiles for the Email plan.
- Purchase history, viewed products and predicted lifetime value can feed segments and flows.
- Any profile that can be emailed counts, regardless of recent engagement, so clean the list before you move to a higher tier.
- SMS credits sit outside the email plan.
Pros
- Free plan for up to 250 active profiles
- strong segmentation from purchase and browsing data
- flows for onboarding, win back and repeat purchase
Cons
- Billing is based on active profiles, so inactive profiles can still add cost, and SMS is charged separately
Brevo
Best for: Low cost email and CRM
Brevo, formerly Sendinblue, prices email marketing by the number of emails sent per month rather than by contacts stored. The free plan sends 300 emails per day. Starter starts at $9 per month for 5,000 emails per month, Standard starts at $18 per month for 5,000 emails per month, and Professional starts at $499 per month.
- Enterprise is custom priced.
- The gap is automation.
- Starter has no automation at all, according to the vendor feature list, so a team that needs welcome flows, lead nurture or behaviour based sends must
- Brevo also includes a built in CRM plus SMS and WhatsApp on higher tiers.
Pros
- Lowest entry price in this list
- pricing is based on emails sent, not contacts stored
- free plan stores up to 100,000 contacts
Cons
- Starter has no automation, so teams that need automation must move to Standard at $18 per month
Semrush
Best for: Search research and rank tracking
Semrush is the search optimization tool in this list. The SEO plan is $139.95 per month on monthly billing, or $117.33 per month on annual billing. It covers 5 projects and 500 tracked keywords, with 10,000 results per report and 100,000 crawl pages per month.
- The Starter bundle, which adds AI search visibility, is $199 per month, and Pro+ is $299 per month.
- A limited free plan includes one demo project and 10 reports per day.
- Pro does not include historical data, content tools or API access, so teams that need those features must move to Pro+ or Advanced.
- Extra users start at $45 per month, and specialist toolkits are sold separately.
Pros
- Keyword research, site audit, link analysis, competitor research and rank tracking in one account
- 7 day free trial on plans
Cons
- Only one user is included on each plan, and extra users cost from $45 per month
Ahrefs
Best for: Link and keyword research
Ahrefs offers a free tier for verified site owners, a $29 per month Starter plan, and main plans at Lite $129 per month, Standard $249 per month, Advanced $449 per month and Enterprise $1,499 per month. Lite includes 750 tracked keywords, 100,000 crawl credits, 1,000 credits per user per month, 6 months of historical data and 5 non verified projects, with unlimited verified projects. Standard raises tracked keywords to 2,000 and history to 2 years.
- Ahrefs is strongest where links and competitor content decide search results.
- Lite caps credits at 1,000 per user per month.
- Brand Radar is sold separately from $199 per month, and Report Builder is $99 per month.
- There is no free trial on the plans, so use the free tier for your own verified site first.
Pros
- Deep link data and keyword research
- Site Audit and Rank Tracker included
- API and MCP access from Lite
Cons
- Only one user is included, extra users cost $40 per month on Lite, and rank tracking updates weekly rather than daily
Optimizely
Best for: Enterprise experimentation
Optimizely is the experimentation tool in this list, covering Web Experimentation and Feature Experimentation. It supports A/B tests, multivariate tests and multi page tests, plus feature flags and server side tests. That range suits large B2B teams that run many tests at once, need governance and approvals, and want product and marketing tests in the same platform.
- The vendor does not publish a price on its pricing page.
- Every plan is packaged individually and leads to a demo request.
- Treat Optimizely as quote only and ask for the full annual contract, including impression limits, overage charges, seats and support, before you compa
Pros
- A/B, multivariate and multi page testing with a visual editor
- feature experimentation and server side tests for engineering teams
- built for large scale programs
Cons
- No published price and no free plan, so a small team cannot start without a sales conversation and an annual contract
How we chose
We compared tools that cover email and automation, CRM linked marketing, search research, and experimentation. We read each vendor pricing page on 12 November 2026 and used the starting price shown there, with the limit that applies at that price. Where a vendor does not publish a price, we wrote quote only. We did not claim hands on testing, and we did not use review scores, awards or customer counts to rank the tools.
What to check before you buy
Check the billing unit first, because it changes the bill more than the headline price. HubSpot and ActiveCampaign charge by marketing contacts, Mailchimp charges by total contacts, Klaviyo charges by active profiles, Brevo charges by emails sent, and Salesforce charges per org with usage on top. Ask for the price at your real list size, not the smallest tier. Check send limits, automation limits, user limits and history limits on the plan you will actually buy, and confirm data export and integration with your CRM before you migrate a live list.
Frequently asked questions
What is the cheapest B2B SaaS optimization tool for marketing in this list?
Brevo is the cheapest entry point here, at $9 per month for Starter with 5,000 emails per month. Mailchimp Essentials follows at $13 per month for 500 contacts. The cheapest headline price is not always the cheapest real bill, because Brevo Starter has no automation and Mailchimp charges by total contacts. Model the price at your real list size and send volume before you choose.
Which tool is best for B2B email automation?
ActiveCampaign is the strongest automation pick for most growing B2B teams, because Plus at $49 per month adds unlimited automation actions, predictive sending and landing pages. HubSpot is the better pick if you want automation tied to a CRM in the same account, but Professional starts at $890 per month plus onboarding. Test the automation builder on a trial before you migrate a live nurture program.
Do any of these tools offer a free plan?
Yes. HubSpot, Mailchimp, Klaviyo, Brevo, Semrush and Ahrefs offer a free plan or a limited free tier. The limits are tight, with Mailchimp at 250 contacts and 500 sends per month and Klaviyo at 250 active profiles. ActiveCampaign offers a 14 day free trial instead of a free plan, while Salesforce Marketing Cloud and Optimizely have no free plan.
How much does HubSpot Marketing Hub cost for a growing team?
Starter is $20 per seat per month on annual billing and includes 1,000 marketing contacts. Professional is $890 per month and includes 2,000 marketing contacts and 3 core seats, plus a one time onboarding fee of $3,000. Enterprise is $3,600 per month and includes 10,000 contacts, plus a one time onboarding fee of $7,000. Contact blocks add cost above those limits.
Is Semrush or Ahrefs better for B2B search optimization?
Semrush is better if you want keyword research, site audit, rank tracking, competitor research and content tools in one account, starting at $139.95 per month. Ahrefs is better if link research is the priority, starting at $129 per month for Lite with 750 tracked keywords. Many teams use one as the main tool and the other for a second opinion on links.
Why is Optimizely listed as quote only?
Optimizely does not publish a price on its pricing page. Every plan is packaged individually through a sales conversation and ends in a demo request. That is normal for enterprise experimentation platforms, but it means you cannot budget from a list price. Ask for the full annual contract, including limits and overage charges, before you shortlist it.
Sources
- https://www.hubspot.com/
- https://www.hubspot.com/pricing/marketing
- https://www.salesforce.com/
- https://www.salesforce.com/marketing/pricing/
- https://www.activecampaign.com/
- https://www.activecampaign.com/pricing
- https://mailchimp.com/
- https://mailchimp.com/pricing/
- https://www.klaviyo.com/
- https://www.klaviyo.com/pricing
- https://www.brevo.com/
- https://www.brevo.com/pricing
- https://www.semrush.com/
- https://www.semrush.com/pricing/seo-ai-search/
- https://ahrefs.com/
- https://ahrefs.com/pricing
- https://www.optimizely.com/
Prices and features were read on each company’s own website in November 2026. They change often, so confirm the current offer on the official site before you sign up or buy.