Nitrosend is the better choice than QuickMail on four of the seven things this review compares: running email from an AI agent, being built for audiences who opted in, designed newsletters, flows and receipts in your own brand, and what the bill does as the list grows. QuickMail is a cold outreach tool for email and LinkedIn, and its own pricing FAQ describes it as made for opening business with companies you have never contacted. Nitrosend is built for the email a business sends to its own customers and subscribers, and to be run by an agent from inside Claude, ChatGPT, Cursor or Codex. Sending email from an AI agent with Nitrosend takes three steps: add the MCP server at api.nitrosend.com/mcp to the assistant, sign in with OAuth, and describe the email. The MCP guide covers each assistant.
QuickMail runs outreach sequences, and Nitrosend's Outreach feature is still coming. George Hartley, Nitrosend's co-founder, has said how he wants sending addresses set up for agents and what he thinks good outbound looks like. On SaaS Stories in September 2026 he described setting up sending addresses for agents in "one click instead of having to go into, you know, if you're on, say, Google Workspace, having to go in and set one up and then pay and do all that stuff." In the same interview his rules of thumb for outbound were "writing like a human keeping that super short", with "three sentences" built around "relevant to them my specific request and here's why". Until Nitrosend's Outreach ships, QuickMail is the one built for this job.
Nitrosend vs QuickMail, compared
The quick version: five yes-or-no questions a team usually asks when choosing between the two. A tick means the product does it as described on its own pages today. A dash means the honest answer is not a yes or a no.
Nitrosend and QuickMail, side by side
Checked September 25, 2026| Question | Nitrosend | QuickMail |
|---|---|---|
| Send from the chatCan an agent send an email or sequence without anyone opening the web app? | Yes. Yes, through the MCP server. Campaigns and flows stay drafts until approved. | No. Not for its campaigns. Its Agent product gives agents Google Workspace inboxes. |
| Official MCP serverIs there a first-party MCP server an assistant can connect to? | Yes. Yes. A hosted server at api.nitrosend.com/mcp, with OAuth sign-in. | Not a yes or no. Only for QuickMail Agent inboxes, a separate product. |
| Consent required by the termsDo the terms rule out emailing people who never opted in? | Yes. Yes. Unsolicited email and bought or scraped lists are not allowed. | No. No. Its FAQ calls it a cold outreach tool. |
| Newsletters and flowsCan it send designed newsletters and trigger-based flows? | Yes. Yes, on every plan including Free. | No. No. Outreach sequences. |
| Contacts unlimitedAre stored contacts free on every plan? | Yes. Yes, on every plan. | No. No. 1,000 to 100,000 contacts by plan. |
Nitrosend meets 5 of 5 yes-or-no questions on this page, QuickMail 0 of 4. Rows marked with a dash are not a yes or no question for that product.
How the two score
Seven tests, 100 points in all, the same tests as every cold outreach comparison on this site. Each product gets a score out of 10 on each one, and the total adds each score times the points for that test. Nitrosend finishes on 69 and QuickMail on 51.
One test needs a plain explanation. "Built for opted-in audiences" scores whether a product is designed and licensed for email to people who asked to hear from you. It is not a judgment on cold email. The FTC's CAN-SPAM guide lists what every commercial email in the United States must carry, such as a valid physical postal address and a way to opt out, without asking for consent before the first message. The test measures fit for a different job, and it does not help a reader whose job is cold outreach. QuickMail sells no lead generation service, so it scores higher here than tools that bundle a lead database.
Each test, scored
Points out of 100, scores out of 10, September 25, 2026| What we compared | Points | Nitrosend | QuickMail |
|---|---|---|---|
| Run from an AI agent | 20 | 9 out of 10 | 2 out of 10 |
| Built for opted-in audiences | 15 | 10 out of 10 | 5 out of 10 |
| Cold sending: mailboxes, warmup, rotation | 15 | 1 out of 10 | 10 out of 10 |
| Replies and prospect pipeline | 10 | 1 out of 10 | 8 out of 10 |
| Newsletters, flows and receipts, on brand | 15 | 10 out of 10 | 2 out of 10 |
| Cost as volume grows | 15 | 9 out of 10 | 5 out of 10 |
| Integrations, support, track record | 10 | 5 out of 10 | 6 out of 10 |
| Total score | 100 | 69 out of 100 | 51 out of 100 |
Where each one runs out
Rank 1Nitrosend
69 out of 100Total
- Priced by
- Emails sent
- Free plan
- 8,000 emails, then 500 a month
- Entry plan
- $20 a month, 20,000 emails
- Run from an AI agent9 out of 10Official MCP server with OAuth, API signup and a ready sender, so an agent sends with no dashboard (docs).
- Built for opted-in audiences10 out of 10Terms bar unsolicited email and purchased or scraped lists, and CRM imports come in unsubscribed by default (terms).
- Cold sending: mailboxes, warmup, rotation1 out of 10Sends from verified domains through its own delivery layer. It does not connect, warm or rotate Gmail mailboxes (docs).
- Replies and prospect pipeline1 out of 10Built to send, not to prospect, today. No reply inbox, stop-on-reply or lead pipeline for sequences yet; its Outreach feature is listed as coming soon (docs).
- Newsletters, flows and receipts, on brand10 out of 10Newsletters, trigger flows and receipts on every plan, drafted in a Brand Kit read from your own site (pricing).
- Cost as volume grows9 out of 10$20 for 20,000 emails and $100 for 125,000, with contacts unlimited and no add-ons to buy (pricing).
- Integrations, support, track record5 out of 10Shopify, Stripe, HubSpot, Attio and Mailchimp, five bring-your-own sending providers, a Node SDK, a CLI and signed webhooks for transactional email, but a young product from a small team (docs).
Nitrosend
Ask your agent for the next campaign
Connect Nitrosend to Claude, ChatGPT, Cursor or Codex, point Brand Kit at your site, and describe the email. Contacts are unlimited on every plan.
Free: 8,000 emails to start, then 500 a month. No credit card.
Start free
Rank 2QuickMail
51 out of 100Total
- Priced by
- Emails sent and uploaded contacts
- Free plan
- None. A 14-day trial
- Entry plan
- $49 a month, 5,000 emails, 1,000 contacts
- Run from an AI agent2 out of 10No MCP server for its outreach campaigns. A separate product, QuickMail Agent, gives AI agents Google Workspace inboxes over MCP but does not run QuickMail campaigns (QuickMail Agent).
- Built for opted-in audiences5 out of 10Its FAQ calls it a cold outreach tool for companies you never contacted. It sells no lead data (pricing).
- Cold sending: mailboxes, warmup, rotation10 out of 10Unlimited email and LinkedIn senders on every plan, Inbox Rotation, and free warm-up through MailFlow (pricing).
- Replies and prospect pipeline8 out of 10Replies from email and LinkedIn come back to a single inbox. Its pricing lists no built-in CRM (QuickMail).
- Newsletters, flows and receipts, on brand2 out of 10Email and LinkedIn outreach sequences. No designed newsletters, customer flows or receipts (pricing).
- Cost as volume grows5 out of 10$99 for 100,000 emails and 25,000 contacts. Contact caps rise only with the plan (pricing).
- Integrations, support, track record6 out of 10Zapier on every plan, API from Growth, webhooks on Agency, and expert support. Running since 2014 (pricing).
The verdict in short
Nitrosend leads 69 to 51 and wins four of the seven tests. QuickMail is only better on three, and they are the three a cold program runs on. Mailboxes, because every plan includes unlimited email and LinkedIn senders and free warm-up, with Inbox Rotation spreading sends across them. Replies, because answers from email and LinkedIn come back to a single inbox. And integrations and track record, because it has run since 2014, with Zapier on every plan and an API from Growth. A team whose job is cold prospecting should pick QuickMail.
At a glance
Nitrosend and QuickMail are scored here on the same 7 tests, 100 points in all: Nitrosend 69 out of 100, QuickMail 51 out of 100. Nitrosend takes its best score on Built for opted-in audiences and Newsletters, flows and receipts, on brand (10 out of 10) and its lowest on Replies and prospect pipeline (1 out of 10). QuickMail takes its best score on Cold sending: mailboxes, warmup, rotation (10 out of 10) and its lowest on Newsletters, flows and receipts, on brand (2 out of 10). QuickMail scores higher on Cold sending: mailboxes, warmup, rotation and Replies and prospect pipeline and Integrations, support, track record. Scores are unadjusted, and every QuickMail figure was read on its own site on September 25, 2026.
How we scored
Two changes to the scoring on October 2, 2026 apply to all fourteen cold outreach comparisons on this site, not just this one. First, "Run from an AI agent" now carries 20 points, up from 15, and "Cold sending: mailboxes, warmup, rotation" carries 15, down from 20; the other five tests keep their weights. The site's stated view is that sending email is moving to AI agents: its transactional comparisons give the agent test 25 points and its marketing comparisons 20, and the cold outreach set was the only one below 20, so it now matches the marketing set. The five points come from the mailbox test because connecting, warming and rotating mailboxes is also sold on its own by infrastructure vendors such as Mailforge and Inframail, which these pages review on the same test, and it remains a 15-point test that cold outreach tools win outright. Second, the agent test is now scored on one written rule for every vendor: a first-party server the vendor runs and that can launch the send counts fully, one connected with a pasted API key or run on the user's own computer counts for a little less, and a third-party wrapper or a server that only drafts or reads counts for less again. On this page the two changes move Nitrosend from 65 to 69 and QuickMail from 58 to 51.
Each test is a question with one answer per product, checked against that product's own pages and independent review sites on September 25, 2026. A 10 means the product does the job fully on its standard plans. A 5 means it does part of it, or does it only on a higher plan or in a second product. QuickMail prices are monthly list prices in US dollars read on its own pricing page.
Run from an AI agent, 20 of 100. Can an agent inside Claude, ChatGPT, Cursor or Codex build the email or sequence, add the recipients, and send it, with no person opening the web app between the prompt and the send? A draft the agent can approve through its own tools counts as inside the agent. Moving into the web app to finish does not. Scored on one written rule for every vendor: a first-party server the vendor runs and that can send counts fully; a third-party wrapper (Zapier, Composio, Kanopi, community servers) counts for less; a server that only drafts or reads counts for less than one that sends.
Built for opted-in audiences, 15 of 100. Is the product designed and licensed for email to people who asked to hear from you, with consent recorded on every contact, unsubscribes honored automatically, and terms that rule out purchased or scraped lists?
Cold sending: mailboxes, warmup, rotation, 15 of 100. Can it connect many sending mailboxes, warm them up, and rotate a cold sequence across them so no single mailbox carries the volume?
Replies and prospect pipeline, 10 of 100. Does it bring replies from every sending mailbox into one inbox, stop a sequence when someone answers, and track each lead through to a booked meeting?
Newsletters, flows and receipts, on brand, 15 of 100. Can it send designed newsletters, automated flows such as welcome and win-back, and transactional email like receipts to your customers and subscribers, styled from your own site's brand?
Cost as volume grows, 15 of 100. What does the bill do as contacts and emails grow, at published list prices, once every add-on the job needs is counted: mailboxes, warmup, lead credits, contact caps and extra seats?
Integrations, support, track record, 10 of 100. How many tools does it plug into, what support comes with the plan, and how long has it been doing this at scale?
What each one costs in 2026
QuickMail's pricing caps both emails and uploaded contacts on each plan, with unlimited senders and users throughout. Starter is $49 a month for 5,000 emails and 1,000 contacts, Growth is $99 for 100,000 emails and 25,000 contacts, and Agency is $299 for 500,000 emails, 100,000 contacts and two workspaces. Warm-up comes free through MailFlow.
Nitrosend's pricing charges for emails sent, with contacts unlimited on every plan: $20 for 20,000 emails on Pro, $100 for 125,000 on Ultra, and $300 for 500,000 on Enterprise. Newsletters, flows and receipts draw on the same allowance.
What sending costs as the list grows
List prices, USD, September 25, 2026| Scenario | Nitrosend | QuickMail |
|---|---|---|
| Entry plan | Pro, $20 a month (20,000 emails, contacts unlimited) | Starter, $49 a month (5,000 emails, 1,000 contacts) |
| About 100,000 emails a month | Ultra, $100 a month (125,000 emails) | Growth, $99 a month (100,000 emails, 25,000 contacts) |
| About 500,000 emails a month | Enterprise, $300 a month (500,000 emails) | Agency, $299 a month (500,000 emails, 100,000 contacts) |
| Sending mailboxes | Not needed. Nitrosend sends from your verified domain | Unlimited senders connected, with free warm-up |
| Lead data | Not offered. You bring contacts who opted in | Not sold on its pricing page |
At 100,000 and 500,000 emails a month the prices are close. The difference is the contact cap: a customer list past 25,000 people pushes QuickMail up a plan, while Nitrosend's price does not move with the size of the list.
Where QuickMail is the better pick
QuickMail takes three of the seven tests, worth 35 points between them.
- Mailboxes, warm-up and rotation. Unlimited email and LinkedIn senders on every plan, Inbox Rotation and free warm-up through MailFlow. Nitrosend sends from verified domains through its own delivery layer and does not connect or warm Gmail or Outlook mailboxes.
- Replies. Replies from email and LinkedIn land in one inbox. Nitrosend has no reply inbox for sequences.
- Track record and integrations. Running since 2014, with Zapier on every plan, an API from Growth and webhooks on Agency, according to its pricing page.
How QuickMail sends explains why its plans make senders unlimited. Its pricing FAQ says QuickMail does not send through servers of its own: it tells each connected Gmail or Outlook inbox to send, so the message leaves through that provider and reads like one a person sent by hand. Google's Workspace sending limits cap each user account at 2,000 messages a day. Reading the two pages together, an inference rather than something QuickMail states, a cold program grows its daily volume by adding mailboxes, and rotation and warm-up are the work of keeping each one healthy. Nitrosend works the other way round. It sends from a verified domain through its own delivery layer, which suits one designed newsletter going to a whole list at once.
QuickMail's agent work sits in a separate product, and QuickMail's own pricing FAQ points anyone who wants to use its inboxes with an AI agent there, as the much simpler way. QuickMail Agent sells ready-made Google Workspace inboxes for AI agents at $5 a month per address. QuickMail handles the domain, the DNS records and the Google licenses, one MCP server covers every inbox, and each inbox has switches for reading, sending and searching. It gives an agent a mailbox to send and read from, not control of QuickMail's outreach campaigns.
An inbox an agent reads is also a way in. OWASP's entry on prompt injection describes indirect injection: content from an outside source that changes what a model does once the model reads it, and an email from a stranger is that kind of content. Nitrosend's agent inbox, in beta and switched on per account on request, sorts each message before the agent answers it. Mail that passed spam, virus and authentication checks is marked ready for the agent. A mismatched reply-to address, a provider spam flag or suspicious content in the body sends it to a person instead, and mail that fails a virus check can never be released to the agent. The inbox takes only the addresses a brand claims on its own domain, and the rest of that domain's mail stays with its current provider.
Using QuickMail and Nitrosend together
A team with both jobs can run both, one for each.
- Keep prospecting on QuickMail. Its connected mailboxes, warm-up and single reply inbox are built around sequences to people who have not heard from you yet. That is a different job from the email Nitrosend sends.
- Move the people who say yes. When a prospect becomes a customer or subscribes, they belong on your own list. Nitrosend's terms rule out emailing people who never opted in, and its HubSpot import brings contacts in unsubscribed by default, so a prospect only becomes mailable once they say yes.
- Hand the list to the agent. Nitrosend is email run from inside the AI agent, not an email tool with AI added to its dashboard. Describe the newsletter or the onboarding flow in the chat, the agent drafts it in the brand's own design, and campaigns and flows stay drafts until they are approved. The newsletter guide covers the format.
Which one to pick
Pick Nitrosend if you email customers and subscribers who opted in, and you want an AI agent to run it: the newsletter, the welcome and win-back flows, and the receipts, in your brand's own design, with contacts free on every plan. The Nitrosend MCP server and the email marketing guide are the places to start.
Pick QuickMail if your job is cold prospecting by email and LinkedIn: sequences to companies you have not contacted, across many senders, with the replies in one place. It is built for that today, and Nitrosend is not: its own Outreach feature is still listed as coming soon. The email marketing laws guide covers what each kind of sending needs to stay compliant.
Nitrosend vs QuickMail FAQ
Nitrosend, by 69 to 51 on the seven tests. Nitrosend wins running email from an AI agent, being built for opted-in audiences, newsletters, flows and receipts, and cost as the list grows. QuickMail wins mailboxes, replies and integrations, the three that decide a cold program.
Not yet. Nitrosend's docs list an Outreach feature, for finding leads and sending them sequences, as coming soon. Until it launches, Nitrosend sends to people who opted in, and its terms rule out unsolicited bulk email and purchased or scraped lists. For cold prospecting today, a dedicated tool such as QuickMail is the right fit.
In many places, yes, within rules such as CAN-SPAM in the United States. The FTC's compliance guide asks for accurate sender details, a valid physical postal address and a working opt-out honored within 10 business days. Rules differ by country, and some require consent first. This review scores fit for an opted-in audience, not legality.
Its sister product, QuickMail Agent, has one: it gives AI agents Google Workspace inboxes at $5 a month per address. QuickMail's outreach campaigns are not controlled through it. Nitrosend's MCP server runs campaigns, flows and sends, with OAuth sign-in.
Add Nitrosend's MCP server at api.nitrosend.com/mcp in Claude, sign in with OAuth, and describe the email you want. The MCP guide covers Claude, ChatGPT, Cursor and Codex. A single transactional email sends on the call, while campaigns and flows stay drafts until they are approved.
Yes. Plans cap uploaded contacts at 1,000, 25,000 and 100,000. Nitrosend has unlimited contacts on every plan and charges for emails sent.
Yes, and it is a common setup. QuickMail handles cold prospecting, and Nitrosend handles email to the customers and subscribers who opted in.