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Parthenon
What Parthenon is
Parthenon is a constituent relationship management and communications platform for elected officials, available on Android, iOS, and web. Its Reach product sends newsletters, alerts, press releases, and SMS from one platform. Nexus brings constituent records, an inbox, messaging, and casework management together. Its mobile app captures constituent interactions in the field, while an Outlook add-in can validate residency, prepare AI-enabled responses, and summarize past interactions; the add-in is approved for Microsoft 365. Parthenon lists city councils, county commissions, school boards, state legislatures, and the U.S. Congress among its customers. The paid service has a 14-day trial and no free plan. Reach starts at $19 a month, billed monthly, for up to 1,000 contacts and one user license; a .gov email is required. SMS is a paid add-on with platform fees and usage-based credits, and sending requires registering a 10DLC number with the FCC. Parthenon Labs says it is SOC 2 Type 2 certified. Nexus says customer data is hosted in the United States and remains government-owned.
Who it suits
Parthenon is for elected officials and public bodies managing constituent records, casework, and outreach. The listed customers include local, state, and federal government bodies.
What it does well
- Reach sends newsletters, alerts, press releases, and SMS.
- Nexus combines records, inbox, messaging, and casework.
- Mobile app records field interactions.
- Outlook add-in supports residency checks and AI-enabled replies.
- 14-day trial is available.
What to know first
- No free plan is available.
- SMS is a paid add-on with usage-based credits.
- SMS sending requires 10DLC registration with the FCC.
- Reach plans require a .gov email.
Limits
The lowest Reach plan costs $19 a month, billed monthly, and covers up to 1,000 contacts with one user license; a .gov email is required. SMS is a paid add-on with platform fees and usage-based credits, and sending requires registering a 10DLC number with the FCC.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Reach 10k | billed monthly · up to 10,000 contacts · two user licenses · SMS add-on · .gov email required | $135 a month |
| Reach 1k | billed monthly · up to 1,000 contacts · one user license · SMS add-on · .gov email required | $19 a month |
| Reach 15k | billed monthly · up to 15,000 contacts · two user licenses · SMS add-on · .gov email required | $219 a month |
| Reach 20k | billed monthly · up to 20,000 contacts · two user licenses · SMS add-on · .gov email required | $285 a month |
| Reach 25k | billed monthly · up to 25,000 contacts · three user licenses · SMS add-on · .gov email required | $310 a month |
| Reach 30k | billed monthly · up to 30,000 contacts · three user licenses · SMS add-on · .gov email required | $350 a month |
| Reach 40k | billed monthly · up to 40,000 contacts · three user licenses · SMS add-on · .gov email required | $429 a month |
| Reach 2.5k | billed monthly · up to 2,500 contacts · one user license · SMS add-on · .gov email required | $45 a month |
The first 8 of 10 plans, as parthenon.co lists them, read 15 Oct 2026. The maker's own page has the final word. Every plan
Getting started
- Visit https://www.parthenon.co/.
- Choose a Reach plan based on its contact and user limits.
- Use the 14-day trial to evaluate the paid service.
- Access Parthenon on web, Android, or iOS.
- For Reach SMS, arrange 10DLC number registration with the FCC.
Verdict
Parthenon combines constituent management with communications tools across Reach and Nexus. Consider the contact and user limits, .gov email requirement, and separate SMS requirements when reviewing its paid plans.
Questions
How much does Parthenon cost?
Reach 1k costs $19 a month, billed monthly, for up to 1,000 contacts and one user license. Plans range up to Reach 50k at $515 a month, billed monthly, for up to 50,000 contacts and three user licenses.
Is there a free plan or trial?
There is no free plan. A 14-day trial is available.
What platforms does Parthenon support?
Parthenon is available on web, Android, and iOS.
What does Nexus do?
Nexus unifies constituent records, an inbox, messaging, and casework management. It also offers an Outlook add-in and a mobile app for capturing field interactions.
Does Parthenon support Outlook?
Yes. Nexus integrates with Outlook through a Microsoft 365-approved add-in that validates residency, generates AI-enabled responses, and summarizes past interactions.
What should I know about SMS?
SMS is a paid add-on with platform fees and usage-based credits. Sending requires registering a 10DLC number with the FCC.
Facts from Parthenon's own pages
- AI
- Microsoft's certification record says AI is part of the app's core workflows. · learn.microsoft.com, 15 Oct 2026
- AI inbox
- Nexus offers an Outlook add-in that validates constituent residency, generates AI-enabled responses, and summarizes past interactions. · parthenon.co, 8 Oct 2026
- API limit
- The Microsoft certification record says the add-in does not use Microsoft Graph, additional Microsoft APIs or Microsoft Entra ID integration. · learn.microsoft.com, 15 Oct 2026
- Audience
- Parthenon lists city councils, county commissions, school boards, state legislatures, and U.S. Congress among its customers. · parthenon.co, 8 Oct 2026
- Audience management
- Nexus lets offices build subscriber lists, segment audiences and target groups using voter-file information. · parthenon.co, 15 Oct 2026
- Company
- The company identifies itself as Parthenon Labs Incorporated and names Josh Billigmeier and Nick Consler as co-founders. · parthenon.co, 8 Oct 2026
- Company launch
- Co-founder Josh Billigmeier announced Parthenon Labs as a new govtech venture with Nick Consler and described its planned AI-enabled constituent platform. · linkedin.com, 15 Oct 2026
- Company legal record
- Justia records Parthenon Labs Incorporated as the corporation applying for the PARTHENON LABS trademark for SaaS CRM software for elected officials. · trademarks.justia.com, 15 Oct 2026
- Compliance limit
- Microsoft's record lists SOC 2 Type 2 certification dated July 31, 2025, but says Parthenon is not ISO 27001 or FedRAMP compliant. · learn.microsoft.com, 15 Oct 2026
- Data ownership
- Nexus states that government customers retain ownership of their data and that data is hosted in the United States. · parthenon.co, 15 Oct 2026
- Data processed
- The certified app processes Outlook inbox email addresses and stores sender and message-content information in U.S. databases. · learn.microsoft.com, 15 Oct 2026
- Email analytics
- Reach reports opens, clicks, unsubscribes and SMS responses in one view. · parthenon.co, 15 Oct 2026
- Email editor
- Reach provides reusable content blocks and a template library for composing newsletters and alerts. · parthenon.co, 15 Oct 2026
- Founded
- Parthenon's public pages say the founders started the company in the period before its November 2024 launch story, but do not state a precise incorporation year. · parthenon.co, 15 Oct 2026
- Headquarters
- Austin, Texas, United States · parthenon.co, 28 Sept 2026
- Hosting model
- Microsoft's certification record describes Parthenon as SaaS hosted on Amazon Web Services. · learn.microsoft.com, 15 Oct 2026
- Industry event
- The League of California Cities 2025 conference program lists Parthenon Labs as an exhibitor at booth 650. · my.calcities.org, 15 Oct 2026
- Integrations
- Nexus integrates with Outlook through a Microsoft 365-approved add-in. · parthenon.co, 8 Oct 2026
- Licence
- The terms identify the software, services and documentation as Company intellectual property and prohibit copying, modification, reverse engineering and redistribution. · parthenon.co, 15 Oct 2026
- Limit: eligibility
- Reach signup requires a .gov email address on every published tier. · parthenon.co, 15 Oct 2026
- Limit: SMS approval
- SMS onboarding requires FCC 10DLC registration, which Parthenon says typically takes two to three weeks. · parthenon.co, 15 Oct 2026
- Limit: SMS pricing
- SMS is an add-on with a platform fee and usage-based credits rather than an included Reach plan feature. · parthenon.co, 15 Oct 2026
- Mobile app
- Nexus includes a mobile app for recording constituent interactions during events, meetings and field work. · parthenon.co, 15 Oct 2026
- Nexus
- Nexus combines constituent records, inbox handling, messaging and casework management. · parthenon.co, 15 Oct 2026
Where Parthenon stands on Freedom251
- Public Sector CRM Software#7 of 26