Outfunnel and Nitrosend sit on either side of a team's CRM, so they do not replace each other. Outfunnel is a data-sync tool: it keeps a CRM in step with email marketing tools and lead forms, and writes email opens and clicks back onto each contact so sales can see who is engaged. Nitrosend sends the email: campaigns, automated flows and app messages, run from an AI agent, with contacts and lists pulled in from HubSpot or Attio through its own connectors. To send from an AI agent with Nitrosend, add its MCP server at api.nitrosend.com/mcp to Claude, ChatGPT, Cursor or Codex and sign in with OAuth; a single transactional email sends on the call, and campaigns and flows stay drafts until they are approved. How the two fit now depends on the CRM. Outfunnel's end-of-support notice says that, following Pipedrive's acquisition of Outfunnel, it is ending support for every CRM other than Pipedrive: Copper on October 30, 2026, and HubSpot, Salesforce and the rest on November 6, 2026. A HubSpot or Attio team keeps its contacts and lists flowing into Nitrosend without Outfunnel. A Pipedrive team keeps Outfunnel, but Nitrosend is not among the email tools Outfunnel lists, so there the two do not connect.
What Nitrosend and Outfunnel each do
Nine jobs a team usually needs covered when sales and marketing share one CRM. A tick means the product does the job as described on its own pages today. Two crosses on the same row mean neither product covers it. Outfunnel's marketing pages still name HubSpot, Salesforce, Copper and Attio, so the Outfunnel cells follow its help center's list of supported apps, read on October 2, 2026, where Pipedrive is the only CRM open to new users.
What Nitrosend does, and what Outfunnel does
Checked September 25, 2026| Job | Nitrosend | Outfunnel |
|---|---|---|
| Sends emailDoes the product itself send campaigns or app email? | Yes. Yes. Transactional email, campaigns and flows, from 20,000 emails a month on Pro. | No. No. It moves data between the CRM and the email tool that sends. Its own email tool closes on November 1, 2026. |
| Campaigns and automated flowsCan it build a newsletter, a welcome series or a nurture flow? | Yes. Yes, written and designed by the agent in the brand's own style. | No. No. Those run in the connected email tool. |
| Brings CRM contacts and lists inDo contacts and lists from the CRM reach the email tool without a CSV? | Yes. Yes, natively for HubSpot and Attio. Contacts and list membership sync in. | Yes. Yes, its core job. From November 6, 2026, Pipedrive is the only CRM it supports. |
| Pipedrive, Salesforce or CopperDoes it connect to these CRMs? | Not a yes or no. No native connector for these three. | Yes. Pipedrive only from November 6, 2026. Copper support ends October 30 and Salesforce November 6. |
| Writes email engagement to the CRMDo opens and clicks show up on the contact in the CRM? | Not a yes or no. No. Its CRM connectors import into Nitrosend and write nothing back. | Yes. Yes, for the email tools it connects, into Pipedrive after November 6, 2026. |
| Lead scoring and web visitor trackingDoes it score leads from email and website activity? | Not a yes or no. No lead scoring is documented. | Yes. For existing customers only. Both are closed to new customers. |
| Connects directly to the otherIs there a built-in connection between the two? | Not a yes or no. No Outfunnel connector. | No. Nitrosend is not among the email tools it lists. |
| Works from an AI agentCan an agent in Claude or ChatGPT use it over MCP? | Yes. Yes. A hosted MCP server. An agent can create the account and send a transactional email; campaigns stay drafts until approved. | No. No MCP server or AI assistant on its site. |
| Free planIs there a plan that costs nothing and does not expire? | Yes. Yes. 8,000 emails, then 500 a month, and the CRM connectors are included. | No. No. A 14-day free trial, then from $29 a month. |
A tick means the product does the job as described on its own pages today. A dash means the job sits with the other tool, or is only partly covered. The two columns are not a contest: each product is built for different jobs.
On HubSpot and Attio, Nitrosend does the contact sync itself. Its HubSpot connector imports contacts and list membership, and its Attio connector imports people, with phone numbers where present, and list membership. That is the route Outfunnel's own notice points departing customers to: check whether the CRM has a native integration with the marketing tool. Both connectors treat the CRM as a record rather than a consent system, so email and phone channels arrive unsubscribed until a contact opts in through the team's own consent flow. Deals stay in the CRM on both, as do HubSpot companies and tickets and Attio notes, tasks and custom objects, so audiences are built from CRM lists and contact fields.
Four things to plan around when the CRM feeds an email tool that does not write back:
- The unsubscribe lives where the email was sent. Both Nitrosend connectors import and write nothing back to the CRM, so a contact who unsubscribes from a Nitrosend campaign still looks mailable in HubSpot or Attio. Outfunnel's guide to subscription status between apps describes the result: sales "doesn't know what the status is and they might send communication to a contact who shouldn't be contacted". Nitrosend holds the current status, and an agent can look a contact up there before a rep sends a one-off.
- A list changed today may not be in the email tool yet. Outfunnel checks a CRM segment for new or removed contacts once every two hours on every app except Copper, according to its sync timing page. Nitrosend's connector pages tell a team to run Sync contacts again to refresh. A campaign to a CRM list that changed this morning should wait for that refresh.
- Engagement stays in the tool that sent. Outfunnel records opens and clicks on the CRM contact for the email tools it connects, and Nitrosend is not one of them. Nitrosend keeps opens and clicks in its own reporting, where an agent can read them, and its event webhooks count the first human click and leave security scanners and bots out of opens.
- Lead scoring is not something to add later. Outfunnel's lead scoring guide now opens with "Lead scoring is no longer available for new customers", and web tracking says the same. The same guide ranks page visits above email clicks and clicks above opens, which puts an open last as a buying signal. Nitrosend documents no lead scoring.
On Pipedrive, Outfunnel's notice says the app connector, lead scoring and web tracking keep working for existing users. Nitrosend has no Pipedrive connector, so a Pipedrive team that wants Nitrosend for sending moves contacts by CSV. A CSV import in Nitrosend subscribes the new contacts it creates, so the export should hold only people who agreed to marketing email.
The short version
At a glance
Nitrosend is for sending email: campaigns, automated flows and an app's transactional messages, run from an AI agent, with contacts and lists pulled in from HubSpot or Attio. Outfunnel is for moving sales and marketing data: it syncs a CRM with email tools and lead forms and writes email engagement back to the CRM. Following Pipedrive's acquisition, Outfunnel is ending support for every CRM other than Pipedrive by November 6, 2026, and it does not list Nitrosend as a connected email tool, so on HubSpot or Attio Nitrosend's own connectors do the sync, and on Pipedrive the two do not connect. This page carries no score and no winner. Every Outfunnel price was read on its own site on September 25, 2026, and its support dates in its help center on October 2, 2026.
Nitrosend
Connect the CRM, then ask your agent
Connect HubSpot or Attio in Nitrosend, then ask Claude, ChatGPT, Cursor or Codex for the next campaign to a CRM list. Contacts are unlimited on every plan.
Free: 8,000 emails to start, then 500 a month. No credit card.
Start freeWhat each one costs in 2026
Outfunnel's pricing is by active contacts, in US dollars. Basic starts at $29 a month for 100 and reaches $99 for 3,000. Professional starts at $99 for 1,000 and reaches $249 for 15,000, and adds ecommerce events and deal and product fields. Scale starts at $299 a month, billed annually, above 15,000. Every plan has a 14-day free trial, and annual billing takes 16% off.
Nitrosend's pricing is by emails sent: Free gives 8,000 emails and then 500 a month, Pro is $20 for 20,000, and Ultra is $100 for 125,000. Contacts are unlimited, and the pricing page says integrations are not gated by tier, so the HubSpot and Attio connectors come with the Free plan.
What each one costs
List prices, USD, September 25, 2026| CRM contacts synced | Nitrosend | Outfunnel |
|---|---|---|
| 100 | Any plan, from Free. Pro is $20 a month for 20,000 emails | Basic, $29 a month |
| 1,000 | Any plan. Contacts are not what Nitrosend charges for | Basic $79 a month, Professional $99 a month |
| 3,000 | Any plan | Basic $99 a month, Professional $129 a month |
| 15,000 | Any plan. Ultra is $100 a month for 125,000 emails | Professional, $249 a month |
| More than 15,000 | Any plan | Scale, from $299 a month, billed annually |
The two meters are different. Outfunnel counts a contact as active once per billing period if it is in a sync, has engagement recorded, visited the website or has a lead score, and its own advice for a smaller bill is to sync only the contacts being marketed to. Nitrosend grows with the number of emails sent, so syncing a whole CRM costs nothing extra. Outfunnel subscriptions on CRMs other than Pipedrive end on their own on the end date, and the notice says unused pre-paid balance is refunded. A HubSpot or Attio team that only needs contacts and lists in its email tool pays for Nitrosend alone.
Nitrosend and Outfunnel FAQ
Mostly no. It syncs contacts and engagement between a CRM and the email tools that send, such as Mailchimp, ActiveCampaign, Brevo, Klaviyo and MailerLite. It also had an email tool of its own, which its notice says closes for all customers on November 1, 2026.
Not today. Nitrosend is not among the email tools Outfunnel lists, and Nitrosend has no Outfunnel connector. On HubSpot or Attio the two can meet in the CRM until Outfunnel's support for those CRMs ends; on Pipedrive they do not meet at all.
No. Nitrosend's own connectors import HubSpot contacts and lists, and Attio people and lists, on every plan including Free. From November 6, 2026, Outfunnel no longer supports either CRM, so for those teams the connectors are the way contacts reach the email tool.
No. Its HubSpot and Attio connectors import into Nitrosend and write nothing back, so opens, clicks and unsubscribes stay in Nitrosend's own reporting, where an agent can read them. A rep checking whether someone can be emailed should look there, not in the CRM.
Outfunnel's help center lists Pipedrive as the only CRM open to new users. Existing Copper customers lose every feature on October 30, 2026, and HubSpot, Salesforce and other CRMs stop syncing on November 6, 2026. Nitrosend has native connectors for HubSpot and Attio, plus Mailchimp and Shopify imports.
Connect HubSpot under Integrations in Nitrosend and run Sync contacts, then add the Nitrosend MCP server to Claude and ask for the campaign to that list. The campaign is a draft until it is approved, and imported contacts receive it only once they are subscribed in Nitrosend.