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Related Products
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EternalEngine:
About
EternalEngineOS combines five business functions — CRM, invoicing, payments, booking, and email — in one app for solo founders and small service businesses. The one-person business back office: CRM, invoicing, payments, booking and email. Manage clients and contacts, send invoices and estimates, take payments, schedule bookings on your calendar, and send email — all in one place, without juggling five separate subscriptions. EternalEngineOS replaces the patchwork of separate CRM, invoicing, payment, booking and email tools with one simple app designed for one-person businesses. Free tier: $0, no credit card required. Basic: $9.95/mo flat with a 30-day no-card trial. Team $49/mo, Pro $99/mo, Business $199/mo. Built for solo founders and small businesses of every kind. Start free, no card. Basic is $9.95/mo when you're ready. Launched 3 months ago and in beta.
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Optivation:
About
Optivation is one workspace for the five jobs agencies run every week: forms, databases, pages, time tracking and invoicing. The whole client lifecycle runs in one system on shared data, not across five separate tools.
A client intake form writes straight into your database as a record. Every record opens into a full page with notes, files, sub-tasks and a built-in timer. The hours you log there become the line items on an invoice, generated from that same record.
It's built for solo consultants and small studios billing hourly or on retainer. You can start on the free plan. Solo is $19 a month. Studio is $49 a month for up to 3 seats, then $19 for each extra seat. Paid plans come with a 30-day free trial.
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EternalEngine:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Optivation:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Supported
iPad
Not Supported
Android
Supported
Chromebook
Not Supported
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EternalEngine:
Audience
Service businesses and small businesses
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Optivation:
Audience
Solo consultants, freelancers, and small agency studios in design, marketing, and consulting that bill hourly or on retainer, have outgrown single-purpose freelancer tools, and find enterprise PSA platforms overkill.
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EternalEngine:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Not Supported
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Optivation:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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EternalEngine:
API
Offers API
Not Supported
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Optivation:
API
Offers API
Not Supported
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EternalEngine:
Screenshots and Videos |
Optivation:
Screenshots and Videos |
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EternalEngine:
Pricing
$9.95/month
Free $0 (no card, not a trial). Basic $9.95/mo flat, with a 30-day no-card trial. Team $49/mo. Pro $99/mo. Business $199/mo.
Free Version
Supported
Free Trial
Supported
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Optivation:
Pricing
$19/month
Optivation uses flat pricing — no per-seat cost for solo operators.
Forms Free — $0 Client intake and lead-capture forms. Up to 3 active forms and 50 submissions per month, viewed in-app and exported to CSV. Docs and community support. Solo — $19/month ($190/year, two months free) Everything needed to run client work from first task to paid invoice: Inbox, Pages, Databases, Contacts, time tracking, branded invoicing, Forms and Dashboards, AI Advisor and Assistant, full API and MCP access, and Gmail/Outlook integration. One seat, 1M AI tokens per month. Email support. Studio — $49/month ($490/year, two months free) Everything in Solo, plus team roles and permissions, real-time co-editing, team chat, access groups, a 7-year compliance-grade audit log, and 5M AI tokens shared across seats. Up to 3 seats included; additional seats are $19/seat per month. Priority email support. Free trial: 30 days, no credit card required, with all Solo features unlocked. If you do not upgrade, the account moves to the Forms Free plan and your data is retained. Annual billing saves two months on Solo and Studio.
Free Version
Supported
Free Trial
Supported
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EternalEngine:
Reviews/
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Optivation:
Reviews/
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EternalEngine:
Training
Documentation
Not Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Optivation:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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EternalEngine:
Company InformationEternalEngine
Founded: 2026
United States
eternalengineos.io/basic/
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Optivation:
Company InformationOptivation
New Zealand
www.optivation.io
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EternalEngine:
Alternatives |
Optivation:
Alternatives |
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Optivation:
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EternalEngine:
Categories |
Optivation:
Categories |
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EternalEngine:
Business Management Features
Billing & Invoicing
Supported
CRM
Supported
Employee Management
Not Supported
Financial Management
Supported
Inventory Management
Not Supported
Marketing Management
Supported
Order Management
Not Supported
Point of Sale (POS)
Not Supported
Project Management
Not Supported
Purchasing
Not Supported
Scheduling
Supported
Time & Expense Tracking
Not Supported
Training Management
Not Supported
Vendor Management
Not Supported
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Optivation:
Project Management Features
Agile Methodologies
Supported
Budget Management
Not Supported
Client Portal
Supported
Collaboration Tools
Not Supported
Cost-to-Completion Tracking
Not Supported
Customizable Templates
Supported
Gantt Charts
Not Supported
Idea Management
Not Supported
Kanban Board
Supported
Milestone Tracking
Supported
Portfolio Management
Not Supported
Resource Management
Not Supported
Time & Expense Tracking
Supported
Traditional Methodologies
Not Supported
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EternalEngine:
Integrations
Gmail
Not Supported
Microsoft SMTP Service
Not Supported
Notion
Not Supported
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Optivation:
Integrations
Gmail
Supported
Microsoft SMTP Service
Supported
Notion
Supported
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EternalEngine:
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Optivation:
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