Missive vs PromptLab: which should you use for a shared inbox in 2026?
Missive is a collaborative email client with shared inboxes, SMS and WhatsApp; PromptLab is a CRM with an inbox built in. Price, channels and AI compared.
Published 20 October 2026. Prices and features from each vendor's own pages.
The short answer
MissivePaid from $14/seatChoose it if you want Instagram or Messenger in the inbox as well as email and WhatsApp.
PromptLabIn the CRM from $11.99/seatChoose it if you want every email, WhatsApp and Telegram thread on the contact and deal it belongs to.
Missive is a dedicated collaborative email client for teams, with shared inboxes, internal threads and SMS, WhatsApp and social accounts. PromptLab is a CRM for B2B teams that sell products, with a shared inbox built in. You are choosing between an email client that sits next to your CRM and an inbox that lives inside it.
Below, we compare price, the mailboxes and channels each connects, teamwork on a thread, AI, and CRM links. We make PromptLab, so every figure comes from Missive's own pricing and product pages and PromptLab's pricing page, and we say where Missive is stronger. Prices are per user a month, Missive billed annually and PromptLab billed monthly, unless we say otherwise.
Missive vs PromptLab at a glance
| Checked on 20 October 2026 | Missive | PromptLab |
|---|---|---|
| Pricing | ||
| Free plan | ||
| Paid plans, a month | $14 – $36per seat | $11.99 – $99per seat |
| Free trial | 30 days | 14 days |
| Billing | Billed annually | Billed monthly |
| Shared inbox | ||
| Gmail and Outlook accounts | ||
| Assign conversations | ||
| Internal comments | ||
| WhatsApp in the same inbox | ||
| AI reply drafts | From$24/month | |
| CRM integrations | From$24/month | Built in |
Pricing: $14 to $36 against $11.99 to $99
Missive's Starter is $14 a user a month for up to 5 users, Productive is $24 for up to 50 users and Business is $36 with unlimited users. Billed monthly they are $18, $30 and $45. There is no free plan; every new team gets a 30-day trial of Productive with no credit card.
PromptLab is $11.99 for Basic, $23.99 for Professional and $99 for Business, billed monthly, with a 14-day free trial on Basic and Professional. Missive's plan is the inbox alone; PromptLab's is the whole CRM. A team that also pays for a CRM pays for both.
Mailboxes and channels
Missive connects Gmail and Google Workspace, Outlook and Office 365, Exchange, iCloud and IMAP accounts. It can also connect SMS and social accounts, including WhatsApp, Messenger and Instagram, and each user can add up to 5 shared accounts.
PromptLab's inbox connects Gmail, Outlook, Exchange and other IMAP mailboxes, next to WhatsApp and Telegram, on Basic. SMS joins on Professional with a number. It has no Instagram or Messenger. Every thread is linked to its contact and deal.
Working a thread together, and AI
Missive's collaboration features include team inboxes, internal threads, collaborative drafting, assignment and internal chat. From Productive, rules include auto-assignment, and Missive lists SLA and round-robin assignment for WhatsApp. PromptLab has assignment and internal notes on a thread, without SLAs.
Missive's AI assistant needs Productive or Business. It drafts replies in the conversation and can search emails and calendar events. AI credits cost the provider price plus 25%, or a team can bring its own API key. PromptLab has no AI reply drafts in the inbox.
Where Missive is stronger
Missive is stronger on channels and on AI. It reaches Instagram and Messenger, drafts replies with AI, and has rules and API access from Productive, plus SLA and round-robin assignment for WhatsApp. On Business it adds SAML single sign-on and IP restrictions.
Its CRM integrations include HubSpot, Pipedrive, Salesforce, Close and Daylite, starting on Productive at $24. If your team lives in an email client and uses a CRM you already pay for, Missive slots in beside it.
Threads that sit on the deal
In PromptLab a thread is attached to a contact and a deal, so nothing needs syncing. Quotes, meeting notes and sales orders live on the same deal.
It is built for sales conversations, not a support desk. A team that wants one tool and one price for the CRM and the inbox is the match.
Which should you choose?
Choose Missive if…
- You want Instagram or Messenger in the inbox as well as email and WhatsApp.
- You want AI to draft replies and search your email, on Productive or Business.
- You already pay for HubSpot, Pipedrive, Salesforce or Close and want the inbox to connect to it.
Choose PromptLab if…
- You want every email, WhatsApp and Telegram thread on the contact and deal it belongs to.
- You want one tool and one price per user for the CRM and the inbox.
- You want to assign threads and talk them over in internal notes.
Frequently asked questions
Is PromptLab a Missive alternative?
For a sales team, partly. PromptLab's inbox covers Gmail, Outlook, Exchange, IMAP, WhatsApp and Telegram with assignment and internal notes. It has no AI reply drafts, SLAs, Instagram or Messenger.
Is Missive cheaper than PromptLab?
No. Missive's Starter is $14 a user a month billed annually, or $18 billed monthly, against $11.99 for PromptLab's Basic billed monthly. Missive's price is for the inbox only, and its AI and integrations start on Productive at $24.
Can PromptLab replace Missive?
If your inbox is for sales conversations tied to deals, yes. If you need AI drafting, SLAs or social channels, Missive does more.
Does Missive work with a CRM?
Yes. It lists HubSpot, Pipedrive, Salesforce, Close and Daylite. Integrations, rules and API access start on Productive; the Starter plan has none.
Is there a CRM with a shared inbox built in?
Yes. PromptLab connects Gmail, Outlook and IMAP mailboxes alongside WhatsApp and Telegram, with assignment and internal notes, on every plan from $11.99 a user a month with a 14-day free trial.
Sources
- Missive, checked on 20 October 2026: Missive pricing, Missive billing and plans, Missive connected accounts, Missive AI overview, Missive WhatsApp, Missive integrations
- PromptLab, checked on 20 October 2026: PromptLab pricing
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