Exclaimer Alternative: Signatoro

Exclaimer is a cloud platform that applies signatures to a company's mail on Exclaimer's own servers. Signatoro is the agentic email signature platform: one consistent signature for a company's people and its AI agents, with each agent identified the way the company decides and, on the Up to 15 plan or larger, the company's legal footer on every signature. Here is how the two compare.

Signatoro is the agentic email signature platform: a company saves its signature once, and its people and every AI agent it connects use the same one, with each agent identified the way the company decides and, on the Up to 15 plan or larger, the company's legal footer under every signature. Exclaimer is a cloud email signature platform that applies signatures to mail as it passes through Exclaimer's own servers, built for centralized governance, banner campaigns and click analytics.

Choose Signatoro

a company's email comes from its people and several AI agents, it may add or switch agents, and it wants one consistent signature on all of it, with each agent identified the way the company decides and, on the Up to 15 plan or larger, its legal footer on every agent's email; Signatoro fits companies of 50 people or fewer, at a flat price set by size, with no mail routed through a third party's servers.

Choose Exclaimer

a company runs signature banner campaigns and needs click analytics and centralized governance across an organization large enough that Exclaimer's per-user price and ten-user minimum are not the constraint.

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Last updated 30 September 2026

Signatoro and Exclaimer at a glance

Signatoro

Signatoro is the agentic email signature platform: save your signature once, and your people and every AI agent you connect use the same one. Each person's signature goes into Gmail, Outlook or Apple Mail with a guide for each mail app, or into Zoho Mail in one click, and each AI agent, from Claude and ChatGPT to n8n and the company's own code, connects to Signatoro over MCP or the API. Signatoro is built for companies whose email comes from people and several AI agents at once: each agent connects over MCP or the API and fetches the saved signature when asked to sign, or on every email once its instructions say so, so a company that adds, replaces or switches agents keeps one consistent signature without pasting it anywhere again. Signatoro is free for one person and charges a company one flat monthly price set by its size; AI agents come on top and use no seat.

Exclaimer

a cloud email signature platform that applies signatures to mail as it passes through Exclaimer's own servers, built for IT and marketing teams running centralized governance, banner campaigns and click analytics

Exclaimer is a cloud email signature platform used by IT and marketing teams for centralized signature governance, banner campaigns and click analytics. Exclaimer charges $0.90 to $1.75 per user a month on annual billing across its Starter, Standard and Pro tiers, plus a custom Enterprise tier, and every plan carries a minimum of ten users (Exclaimer's own pricing page, read 30 September 2026). Exclaimer used to sell an installed on-premises product, Signature Manager Exchange Edition, but discontinued it on 30 September 2022 and ended support on 30 September 2024; mail now routes through Exclaimer's own cloud datacenters, applied by a transport agent or connector rather than a locally installed program (Exclaimer's own support and product pages, read the same day).

Side by side

	Signatoro	Exclaimer
How does the signature get onto everyone's mail?	Signatoro never sits in the mail path. Each person pastes their finished signature into their own mail app once; on Company it arrives in their invitation. The mail keeps going the way it already went, with nothing of Signatoro's in between.	Exclaimer applies the signature as mail passes through Exclaimer's own cloud datacenters, using a transport agent or connector rather than an installed program, after discontinuing its on-premises product in 2022.
Can each AI agent sign as itself, with an AI disclosure line?	Signatoro lets a company decide how its AI agents identify themselves: an agent signs as the person it works for, by default with a line such as "Sent by Ada, my AI assistant", or as itself with its own name and role, and on Company the owner can require one disclosure line for every agent. A key or connection made for one agent always signs as that agent, so two agents with keys of their own each sign as themselves, even from one mailbox.	Exclaimer's product, disclaimer and AI pages, read 14 October 2026, describe no setting for an AI agent to sign as itself or to carry an AI disclosure line. Exclaimer's disclaimer rules can target a sender, so a company can write its own AI disclosure text as a disclaimer for an agent's mailbox.
Does the company's legal footer reach email its AI agents send?	On the Up to 15 plan or larger, a Signatoro company writes one compliance footnote, such as a confidentiality notice or a registered-office line, that goes under every person's signature and every company AI agent's signature, starting from US, UK, EU, Canada, healthcare or finance wording; the Up to 50 plan also keeps a history of who changed the footnote, when, and what it said.	Yes, for mail that passes through Exclaimer. Exclaimer applies its disclaimers server-side after an email is sent, and its own disclaimer guide says the rule "applies regardless of what drafted the message." Exclaimer's server-side signing covers mail from the company's Microsoft 365, Google Workspace or Exchange, the environments its own integration page lists (exclaimer.com, read 14 October 2026).
What happens when the company switches AI agents?	Signatoro keeps a company's signature when it switches AI agents or providers: the signature is saved on Signatoro, not inside any one agent, so a new agent connected over MCP or the API sends the same signature from its first email, and an edit on Signatoro reaches every agent's next email.	An agent that sends from a mailbox routed through Exclaimer gets that mailbox's signature and disclaimers whichever agent it is, because Exclaimer applies them after sending. Exclaimer's pages, read 14 October 2026, describe no separate setup for each AI agent.
Is there a minimum number of people to sign up?	Signatoro has no minimum headcount on any plan: the free version covers one person, and the Company price applies from the first person.	Exclaimer's own FAQ states the minimum user count for Exclaimer is ten users, billed whether or not the company has ten people sending mail.
What does it cost?	Signatoro is free for one person, with a small Signatoro link under the signature, and a flat monthly price for a company by size: $9 up to 5 people, $19 up to 15 and $49 up to 50, plus $1.50 a month for each extra member.	Exclaimer charges $0.90 to $1.75 per user a month, billed annually across its Starter, Standard and Pro tiers, and every plan requires a minimum of ten users, so the smallest possible Exclaimer bill is $9 to $17.50 a month even for a company with three people (Exclaimer's own pricing page, read 30 September 2026).
What happens if the company stops paying?	Signatoro applies no signature itself; it only generates the text and image a person already pasted in. So if a company stops paying, nothing already pasted into a mail app breaks, and the next signature built reverts to the free version with the small Signatoro link.	Exclaimer's signature is applied on Exclaimer's own servers as mail passes through, so signing stops as soon as the subscription that keeps that transport agent running lapses.
Does it run banner campaigns and click analytics?	Signatoro builds and hosts the signature itself; it does not run banner campaigns or track clicks on them.	Exclaimer's own product pages describe centralized governance, banner campaigns and click analytics as core features, aimed at IT and marketing teams managing signatures at scale.
Does automated or AI-sent mail get the signature too?	Signatoro gives each AI assistant or company agent its own MCP connection or API key to fetch the saved signature before every email, signing as the person or as the agent with an AI disclosure line, and a CRM, a sequencer or the company's own code uses the same API, without routing that mail through Signatoro.	Yes, without extra setup. Because Exclaimer applies the signature to mail as it passes through Exclaimer's own transport agent, anything routed that way is signed regardless of what sent it, including mail sent by a CRM or an assistant.

Exclaimer pricing

Exclaimer lists four plans. Starter, Standard and Pro are priced per user, and Enterprise has custom pricing. Every plan has a minimum of ten users, so the smallest Exclaimer bill runs from $9 a month on Starter to $17.50 on Pro. Licenses count active mailboxes, each email address that gets a signature. Exclaimer's FAQ says monthly billing is available too; the listed rates are annual. A 14-day free trial comes first.

Plan	Price	Details
Starter	$0.90 per user a month, billed annually	One signature template, managed centrally for the whole organization, with directory sync, legal disclaimers and a single promotional banner.
Standard	$1.45 per user a month, billed annually	Adds unlimited templates, signatures by department, three Brand Kits, and scheduled signatures and campaign banners.
Pro	$1.75 per user a month, billed annually	Adds unlimited Brand Kits, HubSpot and Salesforce integration, engagement dashboards with click-throughs, and HRIS sync.
Enterprise	Custom pricing	Standard or Pro, plus a dedicated Customer Success Manager and a tailored onboarding plan.

Signatoro's Company price is set by company size, from the first person: $9 up to 5 people, $19 up to 15 and $49 up to 50, plus $1.50 a month for each extra member.

When to choose Signatoro instead of Exclaimer

Built for a company's AI agents

Signatoro is built for a company whose email comes from people and several AI agents at once. Each agent, from Claude and ChatGPT to n8n and the company's own code, connects to Signatoro over MCP or the API and fetches the saved signature when asked to sign, or on every email once its instructions say so, so a company that adds or switches agents keeps one consistent signature. On the Up to 15 plan or larger, Signatoro puts the company's legal footer under every company AI agent's signature as well as every person's, and each agent signs as the person it works for, with an AI line, or as itself, as the company decides. Exclaimer works on the same email from the server side: its disclaimers are stamped on mail that passes through Exclaimer's servers, whatever drafted it, and Exclaimer's own pages, read 14 October 2026, describe no per-agent identity. For a regulated firm, a brand-conscious company, or one preparing for AI-disclosure rules such as Article 50 of the EU AI Act, Signatoro gives peace of mind that every agent's email carries the brand, the footer and the disclosure the company chose. A Signatoro disclosure line or footnote states what the company chose to say; it does not by itself make an email compliant with any law.

Nothing routes through Signatoro

Exclaimer signs mail on its own servers as it passes through; Signatoro signs nothing, because a person pastes the finished signature into their own mail app and Signatoro never sees that mail again. That structural difference is invisible until a company stops paying: Exclaimer's signing stops the day its subscription does, because the servers doing the signing are Exclaimer's, while a signature already pasted into a mail app keeps working under Signatoro, because nothing installed there was ever Signatoro's to turn off; the next signature built afterward reverts to the free version with the Signatoro link, but everything already sent stays as it was.

The New Outlook double-signing complaint

Exclaimer's own New Outlook add-in doubles or adds extra spacing to a signature when it collides with another signer on the same message, according to a thread in r/sysadmin and a related Spiceworks discussion cited in Signatoro's own content plan. Crossware, another vendor in Exclaimer's category, publishes its own troubleshooting article for the same mechanism, a signature appearing twice in Outlook because two things sign the same message, read 18 September 2026. Signatoro cannot produce this specific failure, because a signature pasted once into a mail app has no second, server-side signer behind it to collide with.

The ten-user floor

Exclaimer bills every plan for a minimum of ten users, so a six-person company on the Standard tier is billed for ten users at $1.45 each, $14.50 a month, the same $14.50 a nine-person company on that tier pays (Exclaimer's own pricing page, read 30 September 2026). A Spiceworks thread calls Exclaimer "too expensive just for signatures" for exactly this reason. Signatoro's Company price is set by the company's actual size instead, with no seat floor: six people cost $10.50 a month.

When to choose Exclaimer instead of Signatoro

Centralized governance, banner campaigns and click analytics

An IT or marketing team running signature banner campaigns across dozens or hundreds of users, and tracking clicks on them from one dashboard, is exactly who Exclaimer's product pages describe: campaign scheduling and click analytics built into the platform. What that team pays for it is Exclaimer's own shape: a per-user bill with a ten-user minimum, and every signature applied on Exclaimer's own servers as mail passes through rather than in each person's mail app. Signatoro does not run banner campaigns or track clicks on them, so that team's job is Exclaimer's to do.

One signature for mail sent by anything, with no integration

A company sending mail from several automated tools, a CRM, a sequencer, an assistant, and not wanting to configure a signature integration for each one individually, gets every one of them signed under Exclaimer without any setup, as long as they send through the company's mailboxes, because the signature and any disclaimer are applied to anything that passes through Exclaimer's servers regardless of what sent it. What that guarantee costs is the relay dependency this page keeps returning to: mail travels through Exclaimer's own servers to get it. Signatoro reaches an AI agent that sends from its own servers, its own agent mailbox or an email API, which never passes through a company mailbox, but only once that agent is connected to Signatoro over MCP or the API; a tool nobody has connected sends mail with no Signatoro signature at all.

Questions about Signatoro and Exclaimer

Which is better for a company that uses several AI agents, Exclaimer or Signatoro?

Signatoro is built for a company whose email comes from people and several AI agents: each agent connects to Signatoro over MCP or the API and fetches the saved signature when asked to sign, or on every email once its instructions say so, signing as the person with an AI line or as the agent, so adding or switching agents keeps one consistent signature. Exclaimer signs mail that passes through Exclaimer's servers, so an agent sending from a mailbox routed through Exclaimer gets that mailbox's signature and disclaimers, and Exclaimer's pages, read 14 October 2026, describe no setting for an agent to sign as itself. A company that wants each AI agent identified its own way, wherever the agent sends from, has the clearer fit in Signatoro; a company whose agents all send through its Microsoft 365 or Google Workspace mailboxes and that relies on Exclaimer's governance has a reason to stay with Exclaimer.

Can Exclaimer make AI agents identify themselves in email?

Exclaimer's product, disclaimer and AI pages, read 14 October 2026, describe no setting for an AI agent to sign as itself or carry an AI disclosure line; Exclaimer's disclaimer rules can target a sender, so a company can write its own AI disclosure text as a disclaimer for an agent's mailbox. Exclaimer's own disclaimer guide notes the EU AI Act's Article 50 duty to tell people when they are interacting with an AI system. Signatoro lets a company decide how its AI agents identify themselves: an agent signs as the person it works for, by default with a line such as "Sent by Ada, my AI assistant", or as itself with its own name and role, and on Company the owner can require one disclosure line for every agent. A key or connection made for one agent always signs as that agent, so two agents with keys of their own each sign as themselves, even from one mailbox.

Does the legal footer appear on email AI agents send?

Exclaimer applies its disclaimers server-side after an email is sent, so mail an agent sends from a mailbox routed through Exclaimer carries them, and Exclaimer's own guide says the rule "applies regardless of what drafted the message" (read 14 October 2026). On the Up to 15 plan or larger, a Signatoro company writes one compliance footnote, such as a confidentiality notice or a registered-office line, that goes under every person's signature and every company AI agent's signature, starting from US, UK, EU, Canada, healthcare or finance wording; the Up to 50 plan also keeps a history of who changed the footnote, when, and what it said. A Signatoro footnote or disclosure line states what the company chose to say; it does not by itself make an email compliant with any law.

What does Exclaimer cost for a small company?

Exclaimer charges $0.90 to $1.75 per user a month, billed annually, with a minimum of ten users on every plan, so a company with three or five people is billed the same $9 to $17.50 a month as a ten-person company (Exclaimer's own pricing page, read 30 September 2026). Signatoro's Company plan, by comparison, is a flat $9 a month for up to 5 people, set by the company's size rather than a seat floor.

What does Signatoro cost for a small company?

Signatoro is free for one person, with a small Signatoro link under the signature, and a flat monthly price for a company by size: $9 up to 5 people, $19 up to 15 and $49 up to 50, plus $1.50 a month for each extra member.

Does Exclaimer have a minimum number of users?

Exclaimer's own FAQ states the minimum user count for Exclaimer is ten users, and licensing is billed per active user regardless of how many people actually send mail (Exclaimer's own pricing page, read 30 September 2026). Signatoro has no minimum headcount on any plan; the free version covers one person and the Company price applies from the first person.

Why does my signature show up twice in the new Outlook?

Exclaimer's own New Outlook add-in doubles or adds extra spacing to a signature when it collides with another signer on the same message, according to a thread in r/sysadmin and a related Spiceworks discussion. Signatoro cannot produce this failure, because a signature pasted once into a mail app has no second, server-side signer behind it to collide with.

What happens to Exclaimer's signature if the company stops paying?

Exclaimer applies the signature on its own servers as mail passes through, so signing stops as soon as the subscription that keeps that transport agent running lapses. Signatoro applies no signature itself; it only generates what a person already pasted into their own mail app, so nothing already pasted breaks if a company stops paying Signatoro, and the next one built reverts to the free version with the Signatoro link.

Should a company switch from Exclaimer to Signatoro, or run both?

A company that needs Exclaimer's banner campaigns, click analytics or centralized governance at scale has a real reason to keep Exclaimer, and Signatoro does not do any of those three things. A company whose main complaint is the ten-user minimum, the per-user price, or mail routing through a third party's servers has a real reason to move to Signatoro's flat Company price instead. The two are not built to run side by side on the same users, since both would be adding a signature to the same mail.

Does either tool sign mail sent by a CRM or an AI assistant automatically?

Signatoro does, once the tool is connected over MCP or its API: each AI assistant, company agent, CRM or sequencer fetches the saved signature at send time, signing as the person or as the agent with an AI disclosure line. Exclaimer also does, without extra setup, because it applies the signature to any mail passing through its own transport agent regardless of what sent it.

Signatoro against other alternatives

WiseStamp Newoldstamp CodeTwo Opensense MySignature Letsignit All alternatives Pricing

Sources

Exclaimer's plans, prices and ten-user minimum are from exclaimer.com/pricing/, read 30 September 2026: $0.90 (Starter), $1.45 (Standard) and $1.75 (Pro) per user a month, billed annually, custom pricing on Enterprise, the FAQ line "The minimum user count for Exclaimer is ten users", licensing by active mailbox, monthly or annual payment, and a 14-day free trial. The same page lists the plan features, including campaign banners from Standard and engagement dashboards with click-throughs on Pro. Prices were first read 18 September 2026 and were unchanged on 30 September 2026. The $9 and $17.50 minimum bills are the listed rates times ten. Exclaimer's discontinued on-premises product and its current cloud transport-agent architecture are from exclaimer.com/support/discontinued/ and exclaimer.com/product/signatures-for-exchange/, read the same day: Signature Manager Exchange Edition was discontinued 30 September 2022 with support ending 30 September 2024, and server-side signing routes mail through Exclaimer's Microsoft Azure datacenters via an on-premises transport agent or Exchange Online connectors. The "too expensive just for signatures" complaint and the New Outlook double-signing complaint are sourced in Signatoro's own content plan (docs/product/content-plan.md), in the Reddit and forum enrichment table: a Spiceworks thread ("O365 sigs desktops/mobile/OWA") and an r/sysadmin thread (`exclaimer_signatures_in_new_outlook`) respectively; Pillar 6 of the same plan carries the paraphrased version of both, without naming the threads. This page adds, as independent corroboration rather than the original source, that Crossware, another vendor in Exclaimer's category, publishes its own troubleshooting article for the same two-things-signing-one-message mechanism, read 18 September 2026. A CodeTwo article on double signatures also turned up in the same search; it was not used, because the live CodeTwo article found describes a different mechanism, Microsoft's roaming-signature sync corrupting a local signature file, not two signers colliding. Exclaimer's disclaimer and AI facts were read 14 October 2026: exclaimer.com/product/disclaimers/ says that with server-side deployment "disclaimers are applied after an email is sent" and lets a company "tailor disclaimers by sender or recipient"; the email-disclaimer guide in Exclaimer's handbook covers the EU AI Act's Article 50 disclosure duty and says a centralized rule "applies regardless of what drafted the message"; the integration page lists Microsoft 365 (server- or client-side), Google Workspace (SMTP relay or client) and Exchange on-premises or hybrid (transport agent). Exclaimer's automation and AI resources page lists research and press releases on AI and trust in business email. None of these pages, nor the Microsoft 365 product page, describes a setting for an AI agent to sign as itself or carry an AI disclosure line, and none describes a separate setup for each AI agent. Signatoro's prices come from apps/web/config/company-bands.config.ts.