COMMS
Telnyx is bolting every communication channel and every model onto one bill.
Alternatives · team communication tools
Roundcube alternatives
The best Roundcube alternatives in team communication tools, ranked by Sparkpulse's velocity_score.
Updated Jul 31, 2026
Looking for the best alternatives to Roundcube? Sparkpulse tracks and ranks 12 alternatives in team communication tools by shipping velocity — how frequently each ships meaningful updates, verified from official changelogs. For reference, Roundcube shipped 0 meaningful updates in the last 30 days and carries a velocity score of 5.0 out of 10 in 2026. The alternatives below are ranked the same way, so you're comparing real release momentum, not marketing claims.
About Roundcube
After four years, Roundcube 1.7 lands — and the release stream is otherwise all CVEs
Roundcube maintains two lines in lockstep: 1.6 as LTS and 1.7 as stable, with security fixes released to both on the same day. The vulnerability stream is heavy and varied — stored XSS via an unescaped attachment MIME type (CVE-2026-54432), a pre-auth SQL injection in the virtuser_query plugin, CSS injection through SVG animate, SSRF bypasses via local address URLs, an infinite loop in the TNEF decoder. Version 1.7.0, released in May after almost four years of development, is the only feature release in the window.
Velocity 5.0 · Last update 1h ago
Top 12 alternatives to Roundcube
Ranked by recent ship velocity. Tap any card for the full editorial breakdown, or pivot to a head-to-head.
COMMS
Slack's app platform is being rebuilt around agents, with the SDKs clearing old ground behind it.
SUPPORT
Twilio's changelog is mostly errata right now — corrections, error codes and deadlines
COMMS
Subsplash is turning its church dashboard from a record of activity into something that acts.
COMMS
Salesmsg is turning a texting inbox into an AI agent that also answers the phone.
COMMS
A mail server whose entire visible output is patching other people's code.
COMMS
Signal's beta train is quietly handing group admins real moderation powers.
PM
Notion is turning itself into the place other companies' agents come to work.
COMMS
The reference Matrix homeserver shipping protocol work on a tight release train
COMMS
Netcore is selling marketing agents and privacy-safe personalization, mostly through blog posts.
COMMS
Krisp turned noise cancellation into a contact-center AI stack — and now defends it against deepfakes.
COMMS
Trumpia publishes SMS marketing explainers where its release notes should be.
Roundcube vs alternatives — shipping velocity at a glance
Velocity score (0–10) and meaningful releases shipped in the last 30 days, from official changelogs. Higher = shipping faster.
| Product | Velocity | Sparks · 30d | Focus areas | Latest release |
|---|---|---|---|---|
| Roundcube (baseline) | 5.0 | 0 | webmailphpsecurity | Roundcube Webmail 1.7.0 |
| Telnyx | 7.5 | 1 | email-apivoice-aimodel-choice | Email API Now Available in Beta |
| Slack | 6.3 | 1 | agentsdeveloper-platformblock-kit | Agent context has landed |
| Twilio | 6.3 | 0 | cpaasmessagingevent-streams | — |
| Subsplash | 6.3 | 1 | church-managementworkflow-automationnatural-language-query | Email Automations for Workflows |
| Salesmsg | 6.3 | 1 | ai-agentssms-messagingvoice-ivr | Collect More Reviews and Turn Every Rating Into an Opportunity |
| Mailu | 5.0 | 0 | self-hosted-emaildockersecurity-patches | — |
| Signal Desktop | 5.0 | 0 | group-admindisappearing-messagesbeta-train | — |
| Notion | 5.0 | 0 | agentsorchestrationdeveloper-platform | Notion 3.6: External Agents, HTML blocks, and more |
| Synapse | 5.0 | 0 | matrixfederationopen-source | — |
| Netcore Cloud | 5.0 | 0 | marketing-blog-feedagentic-marketingpii-tokenization | — |
| Krisp | 5.0 | 0 | contact-center-aivoice-securitydeepfake-detection | Krisp Voice Security reaches admins: defense against voice fraud |
| Trumpia | 5.0 | 0 | sms-marketingseo-contentcompliance-education | — |
The 12 best Roundcube alternatives, in depth
1. Telnyx · velocity 7.5
Telnyx is bolting every communication channel and every model onto one bill.
Over the last 30 days Telnyx shipped 1 meaningful update vs Roundcube's 0, most recently “Email API Now Available in Beta”. Its velocity score of 7.5/10 blends that with longer-term release cadence.
Where Roundcube leans on webmail, php and security, Telnyx focuses on email api, voice ai and model choice.
Over the last 30 days Telnyx has been shipping faster than Roundcube — a point in its favour if release momentum matters to you.
2. Slack · velocity 6.3
Slack's app platform is being rebuilt around agents, with the SDKs clearing old ground behind it.
Over the last 30 days Slack shipped 1 meaningful update vs Roundcube's 0, most recently “Agent context has landed”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Roundcube leans on webmail, php and security, Slack focuses on agents, developer platform and block kit.
Over the last 30 days Slack has been shipping faster than Roundcube — a point in its favour if release momentum matters to you.
3. Twilio · velocity 6.3
Twilio's changelog is mostly errata right now — corrections, error codes and deadlines.
Its velocity score of 6.3/10 reflects longer-term release cadence.
Where Roundcube leans on webmail, php and security, Twilio focuses on cpaas, messaging and event streams.
Twilio and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
4. Subsplash · velocity 6.3
Subsplash is turning its church dashboard from a record of activity into something that acts.
Over the last 30 days Subsplash shipped 1 meaningful update vs Roundcube's 0, most recently “Email Automations for Workflows”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Roundcube leans on webmail, php and security, Subsplash focuses on church management, workflow automation and natural language query.
Over the last 30 days Subsplash has been shipping faster than Roundcube — a point in its favour if release momentum matters to you.
Full Subsplash trajectory → · Compare Roundcube vs Subsplash →
5. Salesmsg · velocity 6.3
Salesmsg is turning a texting inbox into an AI agent that also answers the phone.
Over the last 30 days Salesmsg shipped 1 meaningful update vs Roundcube's 0, most recently “Collect More Reviews and Turn Every Rating Into an Opportunity”. Its velocity score of 6.3/10 blends that with longer-term release cadence.
Where Roundcube leans on webmail, php and security, Salesmsg focuses on ai agents, sms messaging and voice ivr.
Over the last 30 days Salesmsg has been shipping faster than Roundcube — a point in its favour if release momentum matters to you.
Full Salesmsg trajectory → · Compare Roundcube vs Salesmsg →
6. Mailu · velocity 5.0
A mail server whose entire visible output is patching other people's code.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Roundcube leans on webmail, php and security, Mailu focuses on self hosted email, docker and security patches.
Mailu and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
7. Signal Desktop · velocity 5.0
Signal's beta train is quietly handing group admins real moderation powers.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Roundcube leans on webmail, php and security, Signal Desktop focuses on group admin, disappearing messages and beta train.
Signal Desktop and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full Signal Desktop trajectory → · Compare Roundcube vs Signal Desktop →
8. Notion · velocity 5.0
Notion is turning itself into the place other companies' agents come to work.
Its velocity score of 5.0/10 reflects longer-term release cadence; its most recent meaningful update was “Notion 3.6: External Agents, HTML blocks, and more”.
Where Roundcube leans on webmail, php and security, Notion focuses on agents, orchestration and developer platform.
Notion and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
9. Synapse · velocity 5.0
The reference Matrix homeserver shipping protocol work on a tight release train.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Roundcube leans on webmail, php and security, Synapse focuses on matrix, federation and open source.
Synapse and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
10. Netcore Cloud · velocity 5.0
Netcore is selling marketing agents and privacy-safe personalization, mostly through blog posts.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Roundcube leans on webmail, php and security, Netcore Cloud focuses on marketing blog feed, agentic marketing and pii tokenization.
Netcore Cloud and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Full Netcore Cloud trajectory → · Compare Roundcube vs Netcore Cloud →
11. Krisp · velocity 5.0
Krisp turned noise cancellation into a contact-center AI stack — and now defends it against deepfakes.
Its velocity score of 5.0/10 reflects longer-term release cadence; its most recent meaningful update was “Krisp Voice Security reaches admins: defense against voice fraud”.
Where Roundcube leans on webmail, php and security, Krisp focuses on contact center ai, voice security and deepfake detection.
Krisp and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
12. Trumpia · velocity 5.0
Trumpia publishes SMS marketing explainers where its release notes should be.
Its velocity score of 5.0/10 reflects longer-term release cadence.
Where Roundcube leans on webmail, php and security, Trumpia focuses on sms marketing, seo content and compliance education.
Trumpia and Roundcube have shipped at a similar pace over the last 30 days, so the decision comes down to fit and feature depth.
Frequently asked questions
What are the best alternatives to Roundcube?
The top Roundcube alternatives we currently track in team communication tools are Telnyx, Slack, Twilio, Subsplash, Salesmsg, ranked by recent ship velocity.
How is this list of Roundcube alternatives ranked?
Alternatives are ranked by Sparkpulse's velocity_score — release cadence + 30-day spark count + sector-relative ship rate.
Can I compare Roundcube directly with one of these alternatives?
Yes — every card has a "Compare with Roundcube" link to a side-by-side /compare page.