Custom software development company · CMS, CRM, portals
Custom softwaredevelopment company
Software built around how your business actually runs.
We build custom admin panels, CMS platforms, CRMs and customer portals for teams that have outgrown spreadsheets and off-the-shelf SaaS. A senior in-house team works your hours, on a fixed quote.
30+ in-house specialists design, development, QA and growth
✓Approval flowPO #2041 signed off in 4 min
⚡Report readyMonthly sales in 2 seconds
↻QuickBooks sync1,284 invoices updated
60+custom systems delivered
99.9%uptime on managed systems
8–16 wkstypical first release
Trusted by founders, growing businesses and enterprise brands
In short
What is custom software development?
Custom software development is building an application around one business’s processes, rather than adapting the business to a ready-made tool.
✓Built around your process, not a template
✓Released in stages, used early
✓Code and data stay yours
It covers admin panels, CMS platforms, CRMs, customer portals and ERP systems, and suits companies whose work has outgrown spreadsheets or generic SaaS.
At Seoily, we start by mapping how your team actually works, then design the data model, access rules and screens before building in two-week sprints. You see working software on staging every two weeks, and get the code, database and documentation at the end.
Road safety · ClientA website, store and knowledge platform for road safetybars.org.in with the New Delhi Declaration to sign online, a magazine store with Razorpay payments and Shiprocket dispatch, and a working preview of the national road safety repository.
Infrastructure · ClientA contractor’s website built to win trustFrom survey to handover, one contractor: capabilities, projects, RDSO vendor approval and careers for NHAI and Indian Railways buyers, with quotes one click away.
Feminine care · ClientA brand launch for Bella in IndiaBella’s India site is information only, so every sale happens in a shop. Social, reels and Meta and Google ads built the awareness that gets women asking for it.
Automotive lighting · ClientA launch site for HELLA’s LED retrofit bulbsA cinematic site that marks 125 years of HELLA and puts the LED retrofit range, its specs and support front and centre.Read the case study →
Portfolio
Admin panels, portals and platforms we’ve built for clients and our own products.
CMS
Driver Dignity DayBilingual campaign site with a pledge flow
CRM & portal
JUET GunaUniversity admissions lead CRM9,006 leads tracked
Proof, not promises
We don’t just build software. We depend on it.
Mobile Mandir runs on a customer app, a partner app and an admin panel we built and operate. When something is slow or confusing, our own team feels it first.
01Admin panels get used more than the appOur ops team lives in the Mobile Mandir console all day, so we design internal tools with the same care as customer screens.
02Audit logs save argumentsEvery approval, payout and edit is logged with who and when. It has settled more than one dispute.
03Build the integration before the reportClean data from payments and partners made our reports trustworthy. Dashboards on bad data are worse than none.
92% of our projects ship on or before the agreed date. Final plan and price come after a short call.Get my software quote →
Pricing
How much does custom software development cost?
Custom software at Seoily costs from $5,300 for an admin panel to $14,000 and up for a CMS, CRM or customer portal. The number of user roles, modules, integrations and how much data needs migrating change the price most.
Admin panelApps and sites that need a back officeFrom $5,300per project
✓Users, orders and content modules✓Roles and permissions✓Reports and exports✓3 months of support
Can’t find yours? Ask in the chat below and a real person replies.
An admin panel starts from $5,300 a custom CMS or CRM portal from $14,000 and ERP or enterprise systems are quoted after process mapping. Cost depends on user roles, modules, integrations and data migration.
An admin panel takes 4–8 weeks, a CMS 6–10 weeks, a CRM or portal 10–16 weeks and an ERP 4–9 months. We release in stages so your team can use the first modules early.
Buy if a tool fits 80% of your process without workarounds. Build when your process is how you compete, when license costs grow with every user, or when you need several systems joined up.
Yes. We regularly connect to QuickBooks, Xero, Salesforce, HubSpot, Stripe and Twilio, and to any system with an API or database export.
Yes. For health and finance clients we follow HIPAA-aware practices: encrypted data, role-based access, audit logs and hosting on HIPAA-eligible AWS or Google Cloud services. Every project uses SOC 2-style access controls. We don’t hold these certifications ourselves; we build so your own audits go smoothly.
You do. Source code, database, cloud accounts and documentation are handed over, and we sign an NDA before we see anything.
Yes. We work with clients worldwide, schedule calls in your time zone, and hold sprint demos during your business hours. One account lead who answers within hours runs your project.
You get a weekly call in your time zone, a staging demo every two weeks and a shared Slack or Teams channel with your account lead and developers. Progress is tracked in Jira or the tool you already use.
Access to the people who do the work, samples of the sheets or tools you use now, and one decision-maker for sign-offs. We map everything else in discovery.
A support plan covers monitoring, backups, security updates, bug fixes and monthly releases, with a 4-hour priority response. Systems on our plan have run at 99.9% uptime, and that target is written into the SLA.
Talk to the team
Outgrown your spreadsheets? Talk to the team that runs its own platform.
Chat with our assistant, message the team on WhatsApp, or book a call. Whichever you pick, a real strategist follows up within one working day.
SSeoily assistantAI assistant · a real person can take over anytime
Hi! I’m Seoily’s assistant. Want results like your app’s? Pick a question below or type your own.
Services / Software & CMS developmentCustom software development company · CMS, CRM, portals
Custom softwaredevelopment company
Software built around how your business actually runs.
✓Approval flowPO #2041 signed off in 4 min
⚡Report readyMonthly sales in 2 seconds
We build custom admin panels, CMS platforms, CRMs and customer portals for teams that have outgrown spreadsheets and off-the-shelf SaaS. A senior in-house team works your hours, on a fixed quote.
30+ in-house specialists design, dev, QA and growth
60+custom systems delivered
99.9%uptime on managed systems
8–16 wkstypical first release
In short
What is custom software development?
Custom software development is building an application around one business’s processes, rather than adapting the business to a ready-made tool.
It covers admin panels, CMS platforms, CRMs, customer portals and ERP systems, and suits companies whose work has outgrown spreadsheets or generic SaaS.
At Seoily, we start by mapping how your team actually works, then design the data model, access rules and screens before building in two-week sprints. You see working software on staging every two weeks, and get the code, database and documentation at the end.
Road safety · ClientA website, store and knowledge platform for road safetybars.org.in with the New Delhi Declaration to sign online, a magazine store with Razorpay payments and Shiprocket dispatch, and a working preview of the national road safety repository.
Infrastructure · ClientA contractor’s website built to win trustFrom survey to handover, one contractor: capabilities, projects, RDSO vendor approval and careers for NHAI and Indian Railways buyers, with quotes one click away.
Feminine care · ClientA brand launch for Bella in IndiaBella’s India site is information only, so every sale happens in a shop. Social, reels and Meta and Google ads built the awareness that gets women asking for it.
Automotive lighting · ClientA launch site for HELLA’s LED retrofit bulbsA cinematic site that marks 125 years of HELLA and puts the LED retrofit range, its specs and support front and centre.Read the case study →
Portfolio
Admin panels, portals and platforms we’ve built for clients and our own products.
CMS
Driver Dignity DayBilingual campaign site with a pledge flow
CRM & portal
JUET GunaUniversity admissions lead CRM9,006 leads tracked
Proof, not promises
We don’t just build software. We depend on it.
Mobile Mandir runs on a customer app, a partner app and an admin panel we built and operate. When something is slow or confusing, our own team feels it first.
3apps on one backend
242+sevas run through it
99.9%uptime, last 90 days
01Admin panels get used more than the appOur ops team lives in the Mobile Mandir console all day, so we design internal tools with the same care as customer screens.
02Audit logs save argumentsEvery approval, payout and edit is logged with who and when. It has settled more than one dispute.
03Build the integration before the reportClean data from payments and partners made our reports trustworthy. Dashboards on bad data are worse than none.
Custom software at Seoily costs from $5,300 for an admin panel to $14,000 and up for a CMS, CRM or customer portal. The number of user roles, modules, integrations and how much data needs migrating change the price most.
Admin panelApps and sites that need a back officeFrom $5,300per project✓Users, orders and content modules✓Roles and permissions✓Reports and exports✓3 months of support
MOST CHOSENCMS / CRM portalTeams replacing sheets or generic toolsFrom $14,000per project✓Process mapping and UX✓Custom modules and workflows✓2 integrations included✓Data migration and training
ERP & enterpriseMulti-team, multi-location operationsCustomquote✓Security review, SOC 2-style access✓Phased module rollout✓ERP and accounting integrations✓Dedicated team and SLA
Indicative prices, excluding taxes and hosting. Fixed quote after a 20-minute call.
Compare
Seoily vs a freelancer vs a large agency
Process mappingSeoilyDone with your team over videoFreelancer: Works from a briefLarge agency: Yes, by consultants
TeamSeoilyArchitect, developers, QA in-houseFreelancer: One developerLarge agency: Large, often offshored
SecuritySeoilySOC 2-style access, HIPAA-aware buildsFreelancer: Depends on the personLarge agency: Yes, at a premium
DocumentationSeoilyCode, database and guides handed overFreelancer: Rarely writtenLarge agency: Yes
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FAQ
Questions people ask about custom software
An admin panel starts from $5,300 a custom CMS or CRM portal from $14,000 and ERP or enterprise systems are quoted after process mapping. Cost depends on user roles, modules, integrations and data migration.
An admin panel takes 4–8 weeks, a CMS 6–10 weeks, a CRM or portal 10–16 weeks and an ERP 4–9 months. We release in stages so your team can use the first modules early.
Buy if a tool fits 80% of your process without workarounds. Build when your process is how you compete, when license costs grow with every user, or when you need several systems joined up.
Yes. We regularly connect to QuickBooks, Xero, Salesforce, HubSpot, Stripe and Twilio, and to any system with an API or database export.
Yes. For health and finance clients we follow HIPAA-aware practices: encrypted data, role-based access, audit logs and hosting on HIPAA-eligible AWS or Google Cloud services. Every project uses SOC 2-style access controls. We don’t hold these certifications ourselves; we build so your own audits go smoothly.
You do. Source code, database, cloud accounts and documentation are handed over, and we sign an NDA before we see anything.
Yes. We work with clients worldwide, schedule calls in your time zone, and hold sprint demos during your business hours. One account lead who answers within hours runs your project.
You get a weekly call in your time zone, a staging demo every two weeks and a shared Slack or Teams channel with your account lead and developers. Progress is tracked in Jira or the tool you already use.
Access to the people who do the work, samples of the sheets or tools you use now, and one decision-maker for sign-offs. We map everything else in discovery.
A support plan covers monitoring, backups, security updates, bug fixes and monthly releases, with a 4-hour priority response. Systems on our plan have run at 99.9% uptime, and that target is written into the SLA.
