Custom engineering,
platform optional.
LoneSock Consultancy is the services brand sister to KaritKarma Limited. We build custom software for client engagements and deploy KaritKarma products (Wenme, Darwan, BitsPath) as an option, alongside competitors. The client chooses.
- Experience
- 26 years
- Data center
- Tier-3, Bangladesh
- APNIC member
- AS 64005
- Founder-engineered
- Lead is the engineer
A senior-engineering services brand with optional platform leverage.
LoneSock Consultancy is the services sister to KaritKarma Limited. KaritKarma builds products. LoneSock builds custom software for client engagements and integrates KaritKarma products (Wenme, Darwan, BitsPath) into client systems when the client chooses them. The brand has its own site at lonesock.pro.
Engagement shapes include greenfield custom builds, integration projects, infrastructure consultancy, and ongoing professional support. Custom builds use Approach B (standalone codebase built from scratch) so client IP stays clean and no KaritKarma product internals leak into client repositories.
Services
What LoneSock builds, integrates, and supports.
Three shapes of engagement. Each one is led by the founder. Each one can optionally lean on KaritKarma platform products to cut build time, but only when the client picks them.
Custom Software Builds
Standalone codebases built from scratch for client environments. Greenfield product engineering, system integration, and bespoke internal tools.
- Greenfield product engineering
- System integration
- Internal tools and dashboards
Infrastructure Consultancy
Architecture review, deployment design, observability, and post-incident response. On-prem or cloud. Bangladesh data residency available via the Tier-3 data center.
- Architecture review
- Deployment design
- Bangladesh data residency
Professional Support
Ongoing support, maintenance, and training for live client systems. SLA-backed service levels on request. Direct line to the engineer who built it.
- Maintenance contracts
- Training and onboarding
- 24/7 support options
Industries
26 years, repeatedly across the same handful of verticals.
LoneSock has shipped client work in these verticals more than once, which is how compliance, performance, and operational quirks get learnt. New verticals are taken on case by case.
Media and publishing
Newsroom automation, editorial systems
ISP and telecom
Billing, CRM, network management
Fintech and banking
Payment systems, MFS integration
Membership organisations
Club management, digital credentials
Why clients pick LoneSock
The lead engineer on your engagement is the founder. Projects are not handed to junior staff.
Sister brand to KaritKarma, so questions about Wenme, Darwan, or BitsPath integrations land with the product engineers, not a partner-portal queue.
If you want your data inside Bangladesh, we can host on KaritKarma-owned Tier-3 infrastructure (APNIC member, AS 64005) rather than asking you to spin up your own.
Adopting KaritKarma platform products drops build time and ongoing maintenance cost. If you prefer competitor stacks, we build against those.
LoneSock vs the alternatives
Honest comparison, not a pitch.
Versus a typical software agency or a freelancer, here is what the LoneSock model does differently and where the alternatives are sometimes a better fit.
| Capability | LoneSock | Typical agency | Solo freelancer |
|---|---|---|---|
| Lead engineer has 26 years of experience | Depends | Varies | |
| Direct access to platform product teams | Wenme / Darwan / BitsPath | ||
| Client owns IP cleanly (Approach B) | Sometimes | ||
| Optional Bangladesh data-residency hosting | Tier-3 + AS 64005 | ||
| Platform leverage to reduce build time | |||
| Founder-engineered, not handed to juniors |
Products vs services
Two sister brands. One founder.
KaritKarma Limited builds products that any team can adopt. LoneSock Consultancy builds custom software and integrates those products into client environments when the client picks them. Together they cover the full stack from product to bespoke delivery.
KaritKarma Limited
The products company. 22 production products including the shared platform layer (Wenme, Darwan, BitsPath, Professional Vault), vertical products, and developer tools.
- 22 production products
- Tier-3 data center, APNIC member AS 64005
- Identity, authorization, communications, storage
- Vertical products across fintech, media, networks
LoneSock Consultancy
The services company. Custom builds (Approach B), integration projects, infrastructure consultancy, professional support. Sole proprietorship owned by Lutfar Rahman.
- Custom client builds (Approach B)
- Integration of KaritKarma products (optional)
- Infrastructure consultancy and SOP design
- Professional support, training, maintenance
Frequently asked
LoneSock, asked plainly.
- What does LoneSock Consultancy do?
- LoneSock Consultancy is the services brand sister to KaritKarma Limited. KaritKarma builds products; LoneSock builds custom software for client engagements and deploys KaritKarma products into client environments when the client chooses them. Engagement types include greenfield custom builds, integration of existing KaritKarma products (Wenme, Darwan, BitsPath) into client systems, infrastructure consultancy, and ongoing professional support. LoneSock has its own brand site at lonesock.pro and operates as a sole proprietorship owned by Lutfar Rahman.
- How does LoneSock relate to KaritKarma Limited?
- KaritKarma Limited is the products company. LoneSock Consultancy is the services company. They are separate legal entities run by the same founder (Lutfar Rahman, also Managing Director and CEO of KaritKarma). On a client engagement, LoneSock presents KaritKarma products (Wenme for identity, Darwan for authorization, BitsPath for communications) as options alongside best-in-class competitors. The client chooses. There is no requirement to adopt the KaritKarma stack.
- What are LoneSock's commercial terms?
- Standard engineering time bills at 20 US dollars per hour. Engagement shapes include fixed-scope project quotes, time-and-materials sprints, and ongoing retainers for professional support and maintenance. Discounts apply for multi-month commitments and for projects that adopt KaritKarma platform products (because the platform handles the heavy lifting and the LoneSock build time drops). All engagements run through a written statement of work before any code is committed.
- Does LoneSock build the same way as KaritKarma products?
- Custom client builds use Approach B: a standalone codebase built from scratch for the client's environment, not a fork of KaritKarma product code. This keeps client IP clean and avoids leaking proprietary KaritKarma platform internals. Where the client opts to adopt KaritKarma products (Wenme, Darwan, BitsPath), those products are integrated as services via their public contracts, not copied into the client repository.
- What infrastructure backs LoneSock client deployments?
- LoneSock client systems can deploy to the client's own cloud, to on-premises hardware, or to KaritKarma-owned infrastructure (Tier-3 data center in Bangladesh, APNIC member AS 64005, operating since 2010). The third option is offered when the client wants Bangladesh data residency without running their own datacentre. Auth, DNS, mail, and storage can all be hosted under LoneSock-managed infrastructure if requested.
- How is LoneSock different from a typical software agency?
- Three differences. (1) Direct product access. As the services sister to KaritKarma, LoneSock engineers work alongside the platform product teams, so platform-integration questions get answered in hours, not weeks. (2) 26 years of senior engineering. The lead engineer is the founder; client projects do not get handed to junior staff. (3) Optional platform leverage. If you adopt Wenme, Darwan, or BitsPath, the build time and ongoing maintenance cost drop because the platform handles the regulated infrastructure. If you prefer competitor stacks, LoneSock builds against those instead.
Get started
Ready to scope a build?
Visit lonesock.pro for the services brand, or contact us to discuss your project. Standard rate is 20 USD per hour. Written statement of work before any code is committed.